Use text expectations to skip a test This instead of exiting the test in C++. Bug: angleproject:6826 Change-Id: I1e91f38f0f581821178b3b54ba809e59570b440a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3345615 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Gregg Tavares <gman@chromium.org>