net-dns/avahi: add from upstream

Upgraded net-dns/avahi to version 0.6.31-r1 on amd64, arm, x86

BUG=chromium:234371
TEST=Installed package pulling in net-dns/avahi and verified that mDNS works

Change-Id: Icc6f8851a6a2d980889d46faf054d103eb69ae85
Reviewed-on: https://gerrit.chromium.org/gerrit/48852
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: David Zeuthen <zeuthen@chromium.org>
Commit-Queue: David Zeuthen <zeuthen@chromium.org>
9 files changed