The suppression flag must be set before loading the tests to have an effect.
This got turned around in https://crrev.com/c/899366 and is fixed again by
this CL.

TBR=sergiyb@chromium.org
NOTRY=true

Bug: v8:6917
Change-Id: Ie58465288a0d6eec9a99a23d610710de9e1cdddd
Reviewed-on: https://chromium-review.googlesource.com/911114Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51209}