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 _XPTRDEFS_H
#define _XPTRDEFS_H
#if __GNUC__ >= 3
#pragma GCC system_header
#endif
/*--- DirectShow Reference - DirectShow Structures - TIMECODE_SAMPLE Structure */
#define ED_DEVCAP_ATN_READ 0x13B7
#define ED_DEVCAP_RTC_READ 0x13BA
#endif