mkfs.reiserfs refuses to create a filesystem on full devices without

mkfs.reiserfs refuses to create a filesystem on full devices without
partitions unless it's given -f in addition to the already required Y
input to confirm the fs creation, so give the argument to it.

While we're at it also write the full command line used to create the
filesystem into the log to ease future debugging.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Merge of master-melb:xfs-cmds:31250a by kenmcd.

  Execute bits changed from xxx to ---
  Fix up test with reiserfs