Only define the following before android-L (where new headers define
them already)
typedef khronos_int64_t GLint64;
typedef khronos_uint64_t GLuint64;
typedef struct __GLsync *GLsync;
Also define L to 9999 for crtbrand.c which needs it to be an integer
Change-Id: I9ed957d70b85cd1cdfeacf11f77203b39c93023d