Add 2 CPU Perf jobs for OptimizeForSize

These are the two main variants of Linux CPU Perf tests we do.

No-Try: true
Change-Id: Ieda47590c67a47db50987bf430fe68d29ea6f8f0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/585419
Auto-Submit: Kevin Lubick <kjlubick@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>