debian bug#306798: SELinux security attributes can not be removed and

rdiff-backup should not fail when it fails to remove them from temp
files.  fix from Konrad Podloucky.


git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@595 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109