FBConfigs where missing some filtering that wasn't needed on NVIDIA:
the multisample and accumulation buffers must be the same as the
context's config otherwise glXMakeCurrent will fail. See
FBConfigCompatibility.md for more details.

BUG=angleproject:1109

Change-Id: Ied3336f9f5227594b143c884c4546fd603238b47
Reviewed-on: https://chromium-review.googlesource.com/289273Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>