Make sure GN deps rolls include the optional GN bots.

Make sure GN deps rolls include the optional GN bots.

Some of the GN tryservers are not yet part of the default
CQ set of bots, but we should be sure to run them anyway
on deps rolls that pull in new GN binaries.

R=brettw@chromium.org
BUG=

Committed: https://crrev.com/45884a2d5e69332baeaec2f3e969ecd464b2a627
Cr-Commit-Position: refs/heads/master@{#339749}

[brettw, 2015-07-21 16:27:37]

lgtm

[Dirk Pranke, 2015-07-21 21:01:57]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2015-07-21 21:02:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1239943003/1

[commit-bot: I haz the power, 2015-07-21 21:16:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-21 21:17:36]

Patchset 1 (id:??) landed as
https://crrev.com/45884a2d5e69332baeaec2f3e969ecd464b2a627
Cr-Commit-Position: refs/heads/master@{#339749}