copy_shader_compiler_dlls only on windows

Author: hzqst

Tests/DiligentCoreTest/CMakeLists.txt

@@ -64,7 +64,9 @@ if(WEBGPU_SUPPORTED)
     target_link_libraries(DiligentCoreTest PRIVATE libtint)
 endif()
 
-copy_shader_compiler_dlls(DiligentCoreTest DXCOMPILER_FOR_SPIRV YES)
+if (PLATFORM_WIN32)
+    copy_shader_compiler_dlls(DiligentCoreTest DXCOMPILER_FOR_SPIRV YES)
+endif()
 
 source_group(TREE ${CMAKE_CURRENT_SOURCE_DIR} FILES ${SOURCE} ${SHADERS}})