qrcode: upgraded package to upstream

Upgraded dev-python/qrcode to version 6.1 on arm

BUG=b:164293929
TEST=emerge and cros deploy it to DUT.

Change-Id: I41a0c372eb10d3a7451df166ced80a46e5f45a59
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2372063
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Ching-Kang Yen <chingkang@chromium.org>
Commit-Queue: Ching-Kang Yen <chingkang@chromium.org>
9 files changed