httplib2: update to 0.19.0-r1

Needed for newer gsutil release.

BUG=chromium:1128519
TEST=CQ passes

Change-Id: I6a53f592aa1786cb619e11265a3567d09a6d4fe8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2728941
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Sergey Frolov <sfrolov@google.com>
6 files changed