[Gardening] Mark image-set tests as crashing.

BUG=269627
TBR=pkasting@chromium.org

Review URL: https://codereview.chromium.org/22603003

git-svn-id: svn://svn.chromium.org/blink/trunk@155706 bbb929c8-8fbe-4397-9dbb-9b2b20218538