[perf] Make the buildid cache larger.
[perf] Make the buildid cache larger.

Change-Id: Id6d1d15c123dabe353e64a5cc8a6693cfe2c8f66
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/418547
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@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