1. Fix infinite loop caused by time based fuzzing
2. Shallow copy of the result to avoid dropping output
by different processor.

Bug: v8:6917
Change-Id: Icf823e853be9d3cc8dfd46ed2fb954979bf02d2f
Reviewed-on: https://chromium-review.googlesource.com/877761
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50737}