This caused the backends to fail native context creation and skip tests
on these configs.

BUG=angleproject:2464

Change-Id: I04922853a33c4bd8b38c87145f65431d8eb3db10
Reviewed-on: https://chromium-review.googlesource.com/1054482Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>