fromupstream: Print nicer message about SSL errors

At the moment "https://patchwork.linux-mips.org" is giving an error
about an expired SSL certificate.  Error is on the server side as
confirmed by going to that page on a normal web browser.  Rather than
throwing an ugly exception and stopping the script, let's print
something nice.

BUG=None
TEST=Pick a patch w/ a bogus msgid and get no error now.

Change-Id: I5183fdd6fd79f1d7fce8121e9ff4e27d07296681
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2402079
Tested-by: Douglas Anderson <dianders@chromium.org>
Commit-Queue: Douglas Anderson <dianders@chromium.org>
Commit-Queue: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Auto-Submit: Douglas Anderson <dianders@chromium.org>
1 file changed