This enables comparing single runs from the direct command line ouptut
generated by --runtime-call-stats

No-Try: true
No-Presubmit: true
Change-Id: Ieac06bbd95c2a73f8064af161fe35f6fb083648f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2170093
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Sathya Gunasekaran  <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67432}