Includes
  2019-10-23 tandrii@google.com vpython: more logging when incomplete
  virtualenv dir can't be removed.

R=iannucci

Bug: 869227
Change-Id: Ie06fc55322ac5a467a8ac78c7f8b6ad42bcf0aa9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1877553Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>
Auto-Submit: Andrii Shyshkalov <tandrii@google.com>