Update swift's selinux policies

Allow swift permission to /mnt/state/var/cache/swift.
Allow rsync to write to /mnt/state/var/log/rsyncd.log.

Move directory creation from post-configure.d to configure.d.

Change-Id: I9c8730be8d880229ec3224690f46406d55b2e8e1
Merge "Update swift's selinux policies"