Fix rebaseline-o-matic logging.

Fix rebaseline-o-matic logging.

We'd miss any output between the last poll and the end of
the process.

Also, print out the log lines so that you can see them when
looking at the local log.

BUG=382248
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=176135

[Dirk Pranke, 2014-06-10 00:37:14]

lgtm

[ojan, 2014-06-10 00:38:04]

The CQ bit was checked by ojan@chromium.org

[commit-bot: I haz the power, 2014-06-10 00:38:39]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ojan@chromium.org/327633003/1

[commit-bot: I haz the power, 2014-06-10 01:42:15]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/11354)

[ojan, 2014-06-10 02:17:05]

The CQ bit was unchecked by ojan@chromium.org

[ojan, 2014-06-13 21:57:03]

There are some issues here, but I'll fix them in a followup patch.

[commit-bot: I haz the power, 2014-06-13 21:58:30]

Change committed as 176135