GitLab

The currently pinned version doesn't understand SHA256 package IDs.
Update these pins to the currently deployed vpython version.

R=bpastene@chromium.org, dgarrett@chromium.org

Bug: 878994
Change-Id: I8e5dd3023fd91f3e8f2155638d3464b23f05906f
Reviewed-on: https://chromium-review.googlesource.com/c/1312976Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604645}