UnitTests: Use hermes.s as part of an actual test

Before, the file just existed as the source code for HermesBinary.cpp, but we can test that things assemble correctly too (compare DSPTestBinary.cpp and DSPTestText.cpp).

A bit of jank is needed due to MSVC limitations (see https://docs.microsoft.com/en-us/cpp/error-messages/compiler-errors-1/compiler-error-c2026?view=msvc-170).

Source/UnitTests/Core/DSP/HermesText.h

@@ -0,0 +1,8 @@
+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <string>
+
+extern const char s_hermes_text[21370];