Tweaks to presubmit script.
Tweaks to presubmit script.

- run the same checks on 'git cl upload' as 'git cl pre'
- show the problematic line on non-ascii presubmit check

Bug: angleproject:4601
Change-Id: I321e22fd49f7a83aa062ebae01d13476e57044e3
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2174075
Commit-Queue: Tim Van Patten <c7814369a8d3d5671c484acc7b3215f1bf4221be@google.com>
Reviewed-by: Tim Van Patten <c7814369a8d3d5671c484acc7b3215f1bf4221be@google.com>

ppy/angle,ppy/angle,ppy/angle,ppy/angle