This should prevent CLs failing presubmit checks from landing.

Bug: angleproject:3288
Change-Id: I7d4ee56bd2cbe0089248d1737275aaeac8394d96
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1551839Reviewed-by: Jamie Madill <jmadill@chromium.org>