Add flags for https://github.com/tc39/test262/pull/1225

https: //chromium.googlesource.com/external/github.com/tc39/test262/+log/2682ab5..a919d53
Bug: v8:7834
Change-Id: I059b1c712b5b82186a5d438051cb7f043322b315
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1616541
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61592}