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 _NTDLL_H
#define _NTDLL_H
#if __GNUC__ >=3
#pragma GCC system_header
#endif
typedef enum _SHUTDOWN_ACTION {
ShutdownNoReboot,
ShutdownReboot,
ShutdownPowerOff
} SHUTDOWN_ACTION;
DWORD WINAPI NtShutdownSystem (SHUTDOWN_ACTION Action);
#endif /* _NTDLL_H */