This format is one that doesn't support buffer SRV creation. It seems
like there is no equivalent dEQP test for this format.

BUG=angleproject:1503

Change-Id: I9ecdb9406ca0b62dd54b450d2b50341d76584b2b
Reviewed-on: https://chromium-review.googlesource.com/381435
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>