treewide: convert GPLv2+ license info to SPDX tags

SPDX standardizes how source code conveys its copyright and licensing
information. See https://spdx.github.io/spdx-spec/1-rationale/ . SPDX
tags are adopted in many large projects, including things like the Linux
kernel.

Source/UnitTests/Common/BitFieldTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Common/BitSetTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Common/BitUtilsTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Common/BlockingLoopTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <atomic>
 #include <thread>

Source/UnitTests/Common/BusyLoopTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <atomic>
 #include <thread>

Source/UnitTests/Common/CommonFuncsTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Common/Crypto/EcTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2018 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <algorithm>
 #include <array>

Source/UnitTests/Common/EnumFormatterTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2021 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Common/EventTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 #include <thread>

Source/UnitTests/Common/FileUtilTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2020 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <array>
 #include <gtest/gtest.h>

Source/UnitTests/Common/FixedSizeQueueTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Common/FlagTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <array>
 #include <gtest/gtest.h>

Source/UnitTests/Common/FloatUtilsTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2018 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <limits>
 #include <random>

Source/UnitTests/Common/MathUtilTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Common/NandPathsTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2016 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 #include <string>

Source/UnitTests/Common/SPSCQueueTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 #include <thread>

Source/UnitTests/Common/StringUtilTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2016 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 #include <string>

Source/UnitTests/Common/SwapTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Common/x64EmitterTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <cctype>
 #include <cstring>

Source/UnitTests/Core/CoreTimingTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2016 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Core/DSP/DSPAcceleratorTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <array>
 

Source/UnitTests/Core/DSP/DSPAssemblyTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "Common/FileUtil.h"
 #include "Core/DSP/DSPCodeUtil.h"

Source/UnitTests/Core/DSP/DSPTestBinary.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "DSPTestBinary.h"
 

Source/UnitTests/Core/DSP/DSPTestBinary.h

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/UnitTests/Core/DSP/DSPTestText.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "DSPTestText.h"
 

Source/UnitTests/Core/DSP/DSPTestText.h

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/UnitTests/Core/DSP/HermesBinary.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "HermesBinary.h"
 

Source/UnitTests/Core/DSP/HermesBinary.h

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/UnitTests/Core/IOS/ES/FormatsTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Core/IOS/ES/TestBinaryData.h

@@ -1,6 +1,5 @@
 // Copyright 2017 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/UnitTests/Core/IOS/FS/FileSystemTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2018 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <algorithm>
 #include <array>

Source/UnitTests/Core/MMIOTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 #include <string>

Source/UnitTests/Core/PageFaultTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <chrono>
 

Source/UnitTests/Core/PowerPC/DivUtilsTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2021 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <gtest/gtest.h>
 

Source/UnitTests/Core/PowerPC/Jit64Common/ConvertDoubleToSingle.cpp

@@ -1,6 +1,5 @@
 // Copyright 2019 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <cstring>
 #include <tuple>

Source/UnitTests/Core/PowerPC/Jit64Common/Frsqrte.cpp

@@ -1,6 +1,5 @@
 // Copyright 2018 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <cstring>
 

Source/UnitTests/Core/PowerPC/JitArm64/ConvertSingleDouble.cpp

@@ -1,6 +1,5 @@
 // Copyright 2021 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <functional>
 

Source/UnitTests/Core/PowerPC/JitArm64/FPRF.cpp

@@ -1,6 +1,5 @@
 // Copyright 2021 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <cinttypes>
 #include <functional>

Source/UnitTests/Core/PowerPC/JitArm64/Fres.cpp

@@ -1,6 +1,5 @@
 // Copyright 2021 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <functional>
 

Source/UnitTests/Core/PowerPC/JitArm64/Frsqrte.cpp

@@ -1,6 +1,5 @@
 // Copyright 2021 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <functional>
 

Source/UnitTests/Core/PowerPC/JitArm64/MovI2R.cpp

@@ -1,6 +1,5 @@
 // Copyright 2021 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <cstddef>
 #include <type_traits>

Source/UnitTests/Core/PowerPC/TestValues.h

@@ -1,6 +1,5 @@
 // Copyright 2021 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
 

Source/UnitTests/StubHost.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 // Stub implementation of the Host_* callbacks for tests. These implementations
 // do nothing except return default values when required.

Source/UnitTests/VideoCommon/VertexLoaderTest.cpp

@@ -1,6 +1,5 @@
 // Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
+// SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <limits>
 #include <memory>