Add process_angle_perf_results.py to perf tests data. analyze step doesn't currently trigger angle_perftests on changes to process_angle_perf_results.py Example: https://crrev.com/c/3835162/2 https://ci.chromium.org/ui/p/angle/builders/try/linux-test/7791/overview (so I had to https://crrev.com/c/3835162/3) Bug: chromium:1346781 Change-Id: Id991facedd48036a5c072d910aeb8488712516f5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3835163 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Roman Lavrov <romanl@google.com>