Only build linux installer for desktop.

Only build linux installer for desktop.

Embedded systems have other installer methods, like ChromeOS.

BUG=517496
Committed: https://crrev.com/236fc0b795dc5a4722c187c891174984f28f3a77
Cr-Commit-Position: refs/heads/master@{#347543}

[Peter Mayo, 2015-09-04 01:57:45]

petermayo@chromium.org changed reviewers:
+ dpranke@chromium.org

[Peter Mayo, 2015-09-04 02:04:26]

reference rebase

[Peter Mayo, 2015-09-04 02:09:10]

petermayo@chromium.org changed reviewers:
+ grt@chromium.org

[Peter Mayo, 2015-09-04 02:09:11]

+grt for OWNERS

[grt (UTC plus 2), 2015-09-04 13:56:19]

Rubberstamp owners lgtm. Please ask a linux person to review this for
correctness.

[Dirk Pranke, 2015-09-04 15:49:20]

lgtm.

[Peter Mayo, 2015-09-04 19:25:44]

rebase

[Peter Mayo, 2015-09-04 19:40:03]

sync&rebase

[Peter Mayo, 2015-09-04 23:54:40]

The CQ bit was checked by petermayo@chromium.org

[Peter Mayo, 2015-09-04 23:54:40]

The patchset sent to the CQ was uploaded after l-g-t-m from
dpranke@chromium.org, grt@chromium.org
Link to the patchset: https://codereview.chromium.org/1306303006/#ps60001
(title: "sync&rebase")

[commit-bot: I haz the power, 2015-09-04 23:55:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1306303006/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1306303006/60001

[commit-bot: I haz the power, 2015-09-05 00:16:23]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-09-05 00:17:38]

Patchset 4 (id:??) landed as
https://crrev.com/236fc0b795dc5a4722c187c891174984f28f3a77
Cr-Commit-Position: refs/heads/master@{#347543}