This disables the warnings in the FragData test. We were
getting errors in Debug from the multithreading compile
implementation.

Bug: chromium:931294
Change-Id: I6d1424e54335534f794884e40f527b5464113084
Reviewed-on: https://chromium-review.googlesource.com/c/1465960Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>