Updated from https://raw.githubusercontent.com/KhronosGroup/OpenGL-Registry/master/xml/gl.xml.

BUG=chromium:849576

Change-Id: I92520d53844f7fff7e68ca49207151d4fa69c79e
Reviewed-on: https://chromium-review.googlesource.com/1111469Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>