Add GN for sandbox_linux_jni_unittests

Add GN for sandbox_linux_jni_unittests

BUG=

Committed: https://crrev.com/86da06c7f5925e582a481a5c87fe477edd80944f
Cr-Commit-Position: refs/heads/master@{#317445}

[Ken Rockot(use gerrit already), 2015-02-19 02:10:45]

rockot@chromium.org changed reviewers:
+ jln@chromium.org

[Ken Rockot(use gerrit already), 2015-02-19 02:10:49]

Julienne, please take a look. 

+Dirk CC FYI

[jln (very slow on Chromium), 2015-02-20 03:21:22]

Not an expert, but lgtm.

Thanks for doing this!

[Ken Rockot(use gerrit already), 2015-02-20 03:42:51]

The CQ bit was checked by rockot@chromium.org

[commit-bot: I haz the power, 2015-02-20 03:43:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/936163003/20001

[commit-bot: I haz the power, 2015-02-20 03:48:54]

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

[commit-bot: I haz the power, 2015-02-20 03:48:55]

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

[Ken Rockot(use gerrit already), 2015-02-20 03:50:22]

rockot@chromium.org changed reviewers:
+ brettw@chromium.org

[Ken Rockot(use gerrit already), 2015-02-20 03:50:23]

+brettw for toplevel GN

[Ken Rockot(use gerrit already), 2015-02-20 03:51:01]

New patchsets have been uploaded after l-g-t-m from jln@chromium.org

[brettw, 2015-02-20 23:05:49]

https://codereview.chromium.org/936163003/diff/40001/BUILD.gn
File BUILD.gn (right):

https://codereview.chromium.org/936163003/diff/40001/BUILD.gn#newcode75
BUILD.gn:75: "//sandbox/linux:sandbox_linux_jni_unittests",
I don't think you need to add this line. We'll find it automatically when we
parse the file.

[Ken Rockot(use gerrit already), 2015-02-20 23:08:32]

oh, word. thanks

[Ken Rockot(use gerrit already), 2015-02-20 23:14:13]

The CQ bit was checked by rockot@chromium.org

[commit-bot: I haz the power, 2015-02-20 23:15:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/936163003/60001

[commit-bot: I haz the power, 2015-02-21 00:41:05]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-02-21 00:41:30]

Patchset 4 (id:??) landed as
https://crrev.com/86da06c7f5925e582a481a5c87fe477edd80944f
Cr-Commit-Position: refs/heads/master@{#317445}