Linux: Add xcb to install-build-deps

Linux: Add xcb to install-build-deps

BUG=634085
Committed: https://crrev.com/41f9e395f017af1d8c3c2b51f13e404445ba5f07
Cr-Commit-Position: refs/heads/master@{#409955}

[Tom (Use chromium acct), 2016-08-04 22:21:56]

thomasanderson@google.com changed reviewers:
+ dpranke@chromium.org, thestig@chromium.org

[Tom (Use chromium acct), 2016-08-04 22:21:56]

dpranke for OWNERS approval

The install-build-deps.* scripts were partitioned from
https://codereview.chromium.org/2163623003 so sysadmins can install xcb (if it's
not already installed) before 2163623003 lands.

[Lei Zhang, 2016-08-04 22:24:09]

lgtm

[Dirk Pranke, 2016-08-05 00:07:59]

lgtm

[Tom (Use chromium acct), 2016-08-05 00:17:01]

The CQ bit was checked by thomasanderson@google.com

[commit-bot: I haz the power, 2016-08-05 00:17:35]

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, 2016-08-05 00:51:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-05 00:52:25]

Description was changed from

==========
Linux: Add xcb to install-build-deps

BUG=634085
==========

to

==========
Linux: Add xcb to install-build-deps

BUG=634085

Committed: https://crrev.com/41f9e395f017af1d8c3c2b51f13e404445ba5f07
Cr-Commit-Position: refs/heads/master@{#409955}
==========

[commit-bot: I haz the power, 2016-08-05 00:52:26]

Patchset 1 (id:??) landed as
https://crrev.com/41f9e395f017af1d8c3c2b51f13e404445ba5f07
Cr-Commit-Position: refs/heads/master@{#409955}