Move math and some file and data conversion files out from native to Common.

Buildfixing

Move some file util files

Buildfix

Move KeyMap.cpp/h to Core where they belong better.

libretro buildfix attempt

Move ini_file

More buildfixes

GPU/Vulkan/TextureCacheVulkan.cpp

@@ -19,9 +19,9 @@
 #include <cstring>
 
 #include "ext/xxhash.h"
-#include "file/vfs.h"
+#include "Common/File/VFS/VFS.h"
 #include "Common/Data/Text/I18n.h"
-#include "math/math_util.h"
+#include "Common/Math/math_util.h"
 #include "profiler/profiler.h"
 #include "thin3d/thin3d.h"
 #include "thin3d/VulkanRenderManager.h"