added GL_EXT_timer_query token

include/GL/gl.h

@@ -2231,6 +2231,15 @@ typedef void (APIENTRYP PFNGLBLENDEQUATIONSEPARATEATIPROC) (GLenum modeRGB, GLen
 #endif /* GL_ATI_blend_equation_separate */
 
 
+#ifndef GL_EXT_timer_query
+#define GL_EXT_timer_query 1
+
+#define GL_TIME_ELAPSED_EXT  0x88BF
+
+#endif /* GL_EXT_timer_query */
+
+
+
 /**
  ** NOTE!!!!!  If you add new functions to this file, or update
  ** glext.h be sure to regenerate the gl_mangle.h file.  See comments