Run chflags if rm -rf of chroot dir fails -- some port may have

left some schg junk around.

Tools/portbuild/scripts/setupnode

@@ -6,7 +6,12 @@ fi
 if [ $(echo $(/sbin/mount | grep "$2/.*(read-only)" | awk '{print $3}' | wc -c)) != 0 ]; then
   /sbin/umount -f $(/sbin/mount | grep "$2/.*(read-only)" | awk '{print $3}')
 fi
-rm -rf $2/*/chroot/*
+
+if ! rm -rf $2/*/chroot/* >/dev/null 2>&1; then
+  chflags -R noschg $2/*/chroot/*
+  rm -rf $2/*/chroot/*
+fi
+
 scp -p -a $1:$2/scripts/portbuild $2/scripts
 md5=$(/sbin/md5 $2/$3/tarballs/bindist.tar | awk '{print $4}')
 if [ "$md5" = "$4" ]; then