Increase MSAN timeout from 4 to 9 hours.

Recent runs have been timing out.

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3562

Change-Id: I891d95fce0506df7ffe6cc57c9d2238bab1e547f
Reviewed-on: https://skia-review.googlesource.com/3562
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
2 files changed