temporarily skip simple-cross-origin-progress-events.html for now

this test crashes on Passion, and runs webcore into a bad state on
Stingray. To make sure it does not block the entire layout test
suite on Stingray, skipping this test for now.
http://b/2982500

Change-Id: Id4875112705df9b2c5b003a2c32c292765ab17fc