Move GLES20 source into standard locations
Move Khronos headers into their respective components, to be exported by each.
Remove hostthreadadapter as nothing outside of the vghwapiwrapper, which now contains the code, needs it
#ifndef _AFXRES_H
#define _AFXRES_H
#if __GNUC__ >= 3
#pragma GCC system_header
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _WINDOWS_H
#include <windows.h>
#endif
/* IDC_STATIC is documented in winuser.h, but not defined. */
#ifndef IDC_STATIC
#define IDC_STATIC (-1)
#endif
#ifdef __cplusplus
}
#endif
#endif