qa: multiple_rsync.sh: more output

Trying to track down this failure:

2013-06-12T06:11:13.430 INFO:teuthology.task.workunit.client.0.err:+ rsync -auv --exclude local/ /usr/ usr.2
2013-06-12T06:11:13.430 INFO:teuthology.task.workunit.client.0.err:+ tee a
2013-06-12T06:11:13.527 INFO:teuthology.task.workunit.client.0.out:sending incremental file list
2013-06-12T06:11:46.206 INFO:teuthology.task.workunit.client.0.out:
2013-06-12T06:11:46.208 INFO:teuthology.task.workunit.client.0.out:sent 1689627 bytes  received 8302 bytes  50684.45 bytes/sec
2013-06-12T06:11:46.208 INFO:teuthology.task.workunit.client.0.out:total size is 3274130495  speedup is 1928.31
2013-06-12T06:11:46.209 INFO:teuthology.task.workunit.client.0.err:+ wc -l a
2013-06-12T06:11:46.209 INFO:teuthology.task.workunit.client.0.err:+ grep 4
2013-06-12T06:11:46.211 INFO:teuthology.task.workunit:Stopping misc on client.0...

...and am perplexed!

Signed-off-by: Sage Weil <sage@inktank.com>