Fix gl3stub.h

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

ndk/platforms/common/src/crtbrand.c

@@ -37,6 +37,8 @@ typedef int int32_t[sizeof(int) == 4];
 #define ABI_NOTETYPE	1
 #define ABI_ANDROID_API	PLATFORM_SDK_VERSION
 
+#define L 9999
+
 /*
  * Special ".note" entry to tag an Android binary and specify the ABI version.
  *