Port yuzu-emu/yuzu#9300: "CMake: Use precompiled headers to improve compile times" (#6213)

Co-authored-by: Ameer J <52414509+ameerj@users.noreply.github.com>

src/tests/CMakeLists.txt

@@ -9,6 +9,7 @@ add_executable(tests
     core/hle/kernel/hle_ipc.cpp
     core/memory/memory.cpp
     core/memory/vm_manager.cpp
+    precompiled_headers.h
     audio_core/audio_fixures.h
     audio_core/decoder_tests.cpp
 )
@@ -26,3 +27,7 @@ target_link_libraries(tests PRIVATE common core video_core audio_core)
 target_link_libraries(tests PRIVATE ${PLATFORM_LIBRARIES} Catch2::Catch2WithMain nihstro-headers Threads::Threads)
 
 add_test(NAME tests COMMAND tests)
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(tests PRIVATE precompiled_headers.h)
+endif()

src/tests/precompiled_headers.h

@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"