disable skx SkRP stages

I can reproduce the regression on my skylake xeon desktop.

Bug: skia:10174
Change-Id: Ibdc8dc3339433648223439d465917c67183f6c97
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/285625
Commit-Queue: Mike Klein <mtklein@google.com>
Commit-Queue: Herb Derby <herb@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Herb Derby <herb@google.com>
1 file changed