The script checks a series of conditions, but only fails gracefully if
the first condition fails. If other conditions fails, it will not retry
or output an error message.

Bug: angleproject:3227

Change-Id: Ibb47c2bb1eac90f61f01d87a5051af182816bcad
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1533063
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>