fix typo

jaildk

@@ -160,7 +160,7 @@ jaildk_rc_rcoff() {
                     if ! test -d $j/etc/rcoff; then
                         # in order to be backwards compatible to older jaildk
                         # create the rcoff directory on the fly
-                        mkdir -d $j/etc/rcoff
+                        mkdir -p $j/etc/rcoff
                         ( echo "#!/bin/sh"
                           echo 'echo "$0 disabled in build chroot!"' ) > $j/etc/rcoff/rc
                     fi