Run fewer configs on SwiftShader perf bot

Change-Id: Idc09f052864601498d28c3cfe17b12ef09977543
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/452318
Auto-Submit: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed