Enable -Wl,-z,defs for ozone builds

Enable -Wl,-z,defs for ozone builds

This option diagnoses dependency problems at build time.

TEST=linux_chromium_chromeos_ozone_rel_ng & linux_ecs_ozone tryjobs
BUG=445627
Committed: https://crrev.com/f2104fc2a5cb2c08551d57af8f2143a987cf312f
Cr-Commit-Position: refs/heads/master@{#315160}

[spang, 2015-02-07 00:17:36]

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

[Nico, 2015-02-07 00:19:03]

Yay! lgtm.

[spang, 2015-02-07 00:26:50]

The CQ bit was checked by spang@chromium.org

[commit-bot: I haz the power, 2015-02-07 00:27:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/900343002/1

[commit-bot: I haz the power, 2015-02-07 02:21:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-07 02:22:26]

Patchset 1 (id:??) landed as
https://crrev.com/f2104fc2a5cb2c08551d57af8f2143a987cf312f
Cr-Commit-Position: refs/heads/master@{#315160}