mapi: add GetInteger64vEXT with EXT_disjoint_timer_query

From EXT_disjoint_timer_query spec:

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

See https://github.com/KhronosGroup/OpenGL-Registry/issues/326.

Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/2090
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
3 files changed