Display[GLX|CGL]: correctly set the config conformant bits Reland with a fix for a compilation that happened because of a bad rebase. Previously there was a TODO to check if we supported ES3 before setting the conformant bitfield. Now it is done. BUG=angleproject:1188 Change-Id: I3ef2bd2bc71fb61c465085d32cf08a633904caa6 Reviewed-on: https://chromium-review.googlesource.com/312271 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Corentin Wallez <cwallez@chromium.org>