Mojo+NaCl: Move generated code to mojo/nacl.

Mojo+NaCl: Move generated code to mojo/nacl.

This change moves generated code for Mojo support in NaCl from mojo/monacl to
mojo/nacl. This makes the target directory more consistent across GYP and GN
builds.

An upcoming change for IRT support will generate a header, which will need a
consistent path (relative to include_dirs) across build systems.

BUG=454466
Committed: https://crrev.com/99cdffdb116cf608630600bbbf66a37fcf16695e
Cr-Commit-Position: refs/heads/master@{#314591}

[teravest, 2015-02-04 17:31:35]

teravest@chromium.org changed reviewers:
+ ncbray@chromium.org

[Nick Bray (chromium), 2015-02-04 18:09:16]

LGTM

[teravest, 2015-02-04 18:10:36]

The CQ bit was checked by teravest@chromium.org

[commit-bot: I haz the power, 2015-02-04 18:11:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/896243003/1

[commit-bot: I haz the power, 2015-02-04 18:18:10]

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

[commit-bot: I haz the power, 2015-02-04 18:18:11]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[teravest, 2015-02-04 18:19:16]

teravest@chromium.org changed reviewers:
+ jamesr@chromium.org

[teravest, 2015-02-04 18:19:16]

+jamesr for mojo/ OWNERS in Chromium.

[jamesr, 2015-02-04 18:36:17]

I don't know what inverse_depth is but as long as this won't collide with
anything lgtm

[teravest, 2015-02-04 18:36:41]

The CQ bit was checked by teravest@chromium.org

[commit-bot: I haz the power, 2015-02-04 18:37:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/896243003/1

[commit-bot: I haz the power, 2015-02-04 18:41:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-04 18:42:23]

Patchset 1 (id:??) landed as
https://crrev.com/99cdffdb116cf608630600bbbf66a37fcf16695e
Cr-Commit-Position: refs/heads/master@{#314591}

[teravest, 2015-02-04 18:53:12]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/900983002/ by teravest@chromium.org.

The reason for reverting is: Caused build failures on mac bots. Not sure why it
failed there but not on the CQ..