egl_angle_ext: add more missing extension enum values I was going to do this bit-by-bit, but there are just too many of them, so I'm lumping as many of these enums into one commit as I can. I basically went through all the extensions/EGL_* files and found all the enum definitions there and added them to the xml. Bug: angleproject:7193 Change-Id: Idaffd283e9118abf84bdff9c4e140334a1f8ee06 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3582939 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>