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

Core/Util/PPGeDraw.cpp

@@ -18,7 +18,7 @@
 #include <algorithm>
 
 #include "Common/Data/Color/RGBAUtil.h"
-#include "file/vfs.h"
+#include "Common/File/VFS/VFS.h"
 #include "gfx/texture_atlas.h"
 #include "gfx_es2/draw_text.h"
 #include "image/zim_load.h"