The problem is that the gc pattern is different, and the list of debug scripts
may have more or less duplicates than before. The solution is to just turn off
--stress-opt for the test.

R=yangguo@chromium.org
BUG=v8:4502
LOG=N

Review URL: https://codereview.chromium.org/1416883002

Cr-Commit-Position: refs/heads/master@{#31415}