Skip ShaderStorageBufferTest31.AtomicMemoryFunctions on Linux AMD GL BUG=angleproject:2255 Change-Id: I986ee0e674d0f3fc2425c922ca92a3f8d86efb8c Reviewed-on: https://chromium-review.googlesource.com/775816 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>