Double batch timeout for sanitizer tests. It seems the batch was timing out in ASAN builds. Bug: angleproject:6965 Change-Id: I059e138e7fc43928fb25f905bf85fbb34becd500 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3456662 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>