Fix a CrOS buildername in mb_config.pyl.

Fix a CrOS buildername in mb_config.pyl.

This is cherry-picking https://codereview.chromium.org/2374843002/
back to the main branch.

TBR=dnj@chromium.org
BUG=643238
Committed: https://crrev.com/9703ad9c86932bbd61ba874445d494d52ff8eb70
Cr-Commit-Position: refs/heads/master@{#421389}

[Dirk Pranke, 2016-09-27 22:40:44]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2016-09-27 22:41:17]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-27 23:55:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-27 23:56:50]

Description was changed from

==========
Fix a CrOS buildername in mb_config.pyl.

This is cherry-picking https://codereview.chromium.org/2374843002/
back to the main branch.

TBR=dnj@chromium.org
BUG=643238
==========

to

==========
Fix a CrOS buildername in mb_config.pyl.

This is cherry-picking https://codereview.chromium.org/2374843002/
back to the main branch.

TBR=dnj@chromium.org
BUG=643238

Committed: https://crrev.com/9703ad9c86932bbd61ba874445d494d52ff8eb70
Cr-Commit-Position: refs/heads/master@{#421389}
==========

[commit-bot: I haz the power, 2016-09-27 23:56:51]

Patchset 1 (id:??) landed as
https://crrev.com/9703ad9c86932bbd61ba874445d494d52ff8eb70
Cr-Commit-Position: refs/heads/master@{#421389}