ports-mgmt/poudriere: Update to 3.4.6
Changes:
- bulk -t / testport: Fix fs_violation with pkg 2.6.x
- bulk: Don't try refetching on checksum failure
- jail -d -C wrkdirs: Delete proper wrkdirs directory.
- pkgclean: fix dry-run still generating repo
- bulk fetching + pkgbase jail fixes (#1312)