Camel casing is removed from the enums where it differs from the GLSL
spec. This way it's easier to autogenerate code for built-in
functions mapped to operators.

BUG=angleproject:2267
TEST=angle_unittests

Change-Id: I2490d5d0e8ffb45eba343f225f76779e63381a65
Reviewed-on: https://chromium-review.googlesource.com/929361Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>