Add missing license headers

Source/Core/Common/CDUtils.cpp

@@ -1,3 +1,7 @@
+// Copyright 2009 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
 // Most of the code in this file was shamelessly ripped from libcdio With minor adjustments
 
 #include <algorithm>

Source/Core/Common/CDUtils.h

@@ -1,3 +1,7 @@
+// Copyright 2009 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
 #pragma once
 
 #include <string>

Source/Core/Common/DebugInterface.h

@@ -1,3 +1,7 @@
+// Copyright 2008 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
 #pragma once
 
 #include <cstring>

Source/Core/Common/FifoQueue.h

@@ -1,3 +1,7 @@
+// Copyright 2010 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
 #pragma once
 
 // a simple lockless thread-safe,

Source/Core/Common/GekkoDisassembler.cpp

@@ -1,3 +1,7 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
 /* $VER: ppc_disasm.c V1.5 (27.05.2009)
  *
  * Disassembler module for the PowerPC microprocessor family

Source/Core/Common/GekkoDisassembler.h

@@ -1,3 +1,7 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
 /* $VER: ppc_disasm.h V1.6 (09.12.2011)
  *
  * Disassembler module for the PowerPC microprocessor family

Source/Core/Common/SDCardUtil.cpp

@@ -1,3 +1,7 @@
+// Copyright 2009 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
 /* mksdcard.c
 **
 ** Copyright 2007, The Android Open Source Project