There was a previous error in the gl.xml and generated files that
referenced glMultiDrawElementsBaseVertexOES. This function should not
exist, only the EXT-suffixed version should.
Leaving the other headers alone to avoid conflicts with GL 4.6 work.
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Acked-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>