Reduce timeout threshold for Mac11 tasks

For reasons we don't quite understand, some Perf and Test jobs will
timeout. Normally these tasks are quite quick, so we add a lower timeout
(30 minutes) to keep our limited resources better utilized.

Change-Id: I1f7c4e55e34f8a0f553f10a2be1199799ba8e171
Bug: b/339818100
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/851813
Reviewed-by: John Stiles <johnstiles@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
2 files changed