Add a lock group for systemd-tmpfiles.d

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2717 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
git conflicts...

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2718 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9