Enable according tests

Bug: angleproject:6052
Change-Id: I67bc4d74c997afecf9ed16c7af217de273557587
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2954265Reviewed-by: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Gert Wollny <gert.wollny@collabora.com>