GLES: Fixed build.

src/renderer_gl.h

@@ -622,6 +622,10 @@ typedef uint64_t GLuint64;
 #	define GL_LOCATION 0x930E
 #endif // GL_LOCATION
 
+#ifndef GL_UNSIGNED_INT_10_10_10_2
+#	define GL_UNSIGNED_INT_10_10_10_2 0x8DF6
+#endif // GL_UNSIGNED_INT_10_10_10_2
+
 // _KHR or _ARB...
 #define GL_DEBUG_OUTPUT_SYNCHRONOUS         0x8242
 #define GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH 0x8243