Enable find-missing-symbols-at-link-time for official builds too.

Enable find-missing-symbols-at-link-time for official builds too.

BUG=371125
Committed: https://crrev.com/b43e6cc69ecb0049bbcd84b41cd13847cd01bc4b
Cr-Commit-Position: refs/heads/master@{#312345}

[Nico, 2015-01-21 00:53:24]

thakis@chromium.org changed reviewers:
+ thestig@chromium.org

[Nico, 2015-01-21 00:53:26]

From what I can tell, this Just Works.

[Lei Zhang, 2015-01-21 00:55:11]

lgtm

[Nico, 2015-01-21 03:27:12]

The CQ bit was checked by thakis@chromium.org

[commit-bot: I haz the power, 2015-01-21 03:29:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/855763004/1

[commit-bot: I haz the power, 2015-01-21 03:34:04]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-01-21 03:34:05]

Try jobs failed on following builders:
  mac_chromium_rel_ng on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Nico, 2015-01-21 03:36:40]

The CQ bit was checked by thakis@chromium.org

[commit-bot: I haz the power, 2015-01-21 03:39:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/855763004/20001

[commit-bot: I haz the power, 2015-01-21 14:11:50]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-01-21 14:13:09]

Patchset 2 (id:??) landed as
https://crrev.com/b43e6cc69ecb0049bbcd84b41cd13847cd01bc4b
Cr-Commit-Position: refs/heads/master@{#312345}