Skips failing tests so that they do not affect the results of passing
tests.

Bug: angleproject:4817
Change-Id: I80678cb62b0b81d6a1aa811908019022efbe1268
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2351394Reviewed-by: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Manh Nguyen <nguyenmh@google.com>