[gl.xml] add glGetInteger64vEXT to EXT_disjoint_timer_query (#329)

From EXT_disjoint_timer_query spec:
   "Interaction: This extension adds GetInteger64vEXT if
    OpenGL ES 3.0 is not supported"

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
1 file changed