This contains two CLs of interest:
* https://crrev.com/c/2807199, which strips the 'm' ABI tag and fixes
  https://crbug.com/1187476
* https://crrev.com/c/2820342, which generalises the Python 3 tag logic
  to more than just 3.8

Bug: 1187476,1176014
Change-Id: I2138e9a7b2147c8c72cb99daa08642919a30708c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2823254
Auto-Submit: Owen Rodley <orodley@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>