Enable Release ASSERT in ANGLE. This will mainly affect the Chromium bots. BUG=angleproject:790 Change-Id: I0c4318e83eedba851f15b3b139551cdb6a2fde12 Reviewed-on: https://chromium-review.googlesource.com/346103 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>