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/FramebufferManagerVulkan.cpp

@@ -20,8 +20,8 @@
 #include "profiler/profiler.h"
 
 #include "base/display.h"
-#include "math/lin/matrix4x4.h"
-#include "math/dataconv.h"
+#include "Common/Math/lin/matrix4x4.h"
+#include "Common/Data/Convert/SmallDataConvert.h"
 #include "ext/native/thin3d/thin3d.h"
 
 #include "Common/Vulkan/VulkanContext.h"