[autoroll] Limit SPIR-V Tools -> Chromium roller to 1-2 am PST M-F
[autoroll] Limit SPIR-V Tools -> Chromium roller to 1-2 am PST M-F

Bug: skia:9156
Change-Id: I0f9b0d1d8d01553003bb6fd7bfffb88975d25ba1
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/220157
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot