Pngcrush version determined correctly.

Pngcrush version determined correctly.

'pngcrush -v' writes to stderr. Redirected stderr to stdout.

BUG=none
TEST=manually

Committed: https://crrev.com/73bf3e533652079930114ce8b455032c01b9af68
Cr-Commit-Position: refs/heads/master@{#314153}

[dzhioev (left Google), 2015-01-28 15:21:18]

dzhioev@chromium.org changed reviewers:
+ oshima@chromium.org

[dzhioev (left Google), 2015-01-28 15:21:35]

Hi, please review.

[oshima, 2015-01-30 19:30:04]

lgtm

[dzhioev (left Google), 2015-02-02 15:07:34]

The CQ bit was checked by dzhioev@chromium.org

[commit-bot: I haz the power, 2015-02-02 15:08:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/869433004/1

[commit-bot: I haz the power, 2015-02-02 16:00:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-02 16:02:13]

Patchset 1 (id:??) landed as
https://crrev.com/73bf3e533652079930114ce8b455032c01b9af68
Cr-Commit-Position: refs/heads/master@{#314153}