pbr: upgraded package to upstream

Upgraded dev-python/pbr to version 5.4.5 on amd64

BUG=chromium:1111336
TEST=CQ-passes

Change-Id: Iaa6902346e576dc73af46cee789690592bdae562
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2329161
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Allen Webb <allenwebb@google.com>
Auto-Submit: Allen Webb <allenwebb@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
6 files changed