Here's a test to go along with the '[PATCH 0/6] drm/i915: Avoid stuck page flip waiters on GPU reset' kernel patches. I'm not sure if this should really be in kms_flip since people might actually run that and not expect their machine to be useless afterwards. But kms_flip since it had most of the stuff I need anyway (fbs, flips, modeset) I just added it there.
