Use gold for linking on both 32-bit and 64-bit linux GN builds.

Use gold for linking on both 32-bit and 64-bit linux GN builds.

R=brettw@chromium.org, thestig@chromium.org
BUG=432959
Committed: https://crrev.com/cc2490a2986d70a393c04b6f69e52e82514bc9b7
Cr-Commit-Position: refs/heads/master@{#348703}

[Dirk Pranke, 2015-09-11 21:58:21]

In GYP these days it looks like we always use a 64-bit gold to do links, even
from inside a 32-bit chroot.

This change updates the GN logic to match GYP (but in a simpler form).

https://codereview.chromium.org/1234943009

and

https://codereview.chromium.org/897163002

give some of the gyp-side backstory.

[Lei Zhang, 2015-09-11 22:01:48]

lgtm

I think anyone building on a 32-bit kernel+userland Linux machine is just going
to have a bad time.

[brettw, 2015-09-12 00:03:13]

lgtm

[Dirk Pranke, 2015-09-12 00:14:43]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2015-09-12 00:15:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1338893002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1338893002/1

[commit-bot: I haz the power, 2015-09-12 03:17:17]

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

[commit-bot: I haz the power, 2015-09-12 03:17:18]

Try jobs failed on following builders:
  linux_chromium_gn_dbg on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Dirk Pranke, 2015-09-14 19:20:52]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2015-09-14 19:22:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1338893002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1338893002/1

[commit-bot: I haz the power, 2015-09-14 20:18:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-14 20:19:40]

Patchset 1 (id:??) landed as
https://crrev.com/cc2490a2986d70a393c04b6f69e52e82514bc9b7
Cr-Commit-Position: refs/heads/master@{#348703}

[commit-bot: I haz the power, 2015-09-23 12:36:38]

Patchset 1 (id:??) landed as
https://crrev.com/cc2490a2986d70a393c04b6f69e52e82514bc9b7
Cr-Commit-Position: refs/heads/master@{#348703}