gitlab-ci: Make the test job fail when bugs are unexpectedly fixed.

gitlab-ci: Make the test job fail when bugs are unexpectedly fixed.

If people fix bugs without updating the expected-fails list, then we
end up with a lack of coverage of those failures in the future.  Also,
some day down the line another developer ends up trying to figure out
if the bug was actually fixed or their environment is just failing to
reproduce it.

Suggested-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Acked-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>