Add a stub implementation of khronos_glcts_test to the GN build.

Add a stub implementation of khronos_glcts_test to the GN build.

The bulk of the test suite requires internal test files, and so
we'll defer porting it to GN to a later date, but for now at
least we'll have a skeleton to hang that work on.

R=kbr@chromium.org
BUG=471903, 461019
CQ_EXTRA_TRYBOTS=tryserver.chromium.linux:android_chromium_gn_compile_dbg,android_chromium_gn_compile_rel;tryserver.chromium.win:win8_chromium_gn_rel,win8_chromium_gn_dbg;tryserver.chromium.mac:mac_chromium_gn_rel,mac_chromium_gn_dbg

Committed: https://crrev.com/e0422842dc0deae15c616006ada98782d2a67b40
Cr-Commit-Position: refs/heads/master@{#322976}

[Ken Russell (switch to Gerrit), 2015-03-31 00:26:06]

Thanks for taking care of this. LGTM

[Dirk Pranke, 2015-03-31 00:34:39]

The CQ bit was checked by dpranke@chromium.org

[Dirk Pranke, 2015-03-31 00:34:43]

The CQ bit was unchecked by dpranke@chromium.org

[Dirk Pranke, 2015-03-31 00:35:29]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2015-03-31 00:36:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1041363002/40001

[commit-bot: I haz the power, 2015-03-31 00:41:37]

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

[commit-bot: I haz the power, 2015-03-31 00:41:40]

Try jobs failed on following builders:
  ios_dbg_simulator_ninja on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)
  ios_rel_device_ninja on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)

[Dirk Pranke, 2015-03-31 00:52:11]

The CQ bit was checked by dpranke@chromium.org

[Dirk Pranke, 2015-03-31 00:52:12]

The patchset sent to the CQ was uploaded after l-g-t-m from kbr@chromium.org
Link to the patchset: https://codereview.chromium.org/1041363002/#ps60001
(title: "merge to #322930")

[commit-bot: I haz the power, 2015-03-31 00:52:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1041363002/60001

[commit-bot: I haz the power, 2015-03-31 01:05:15]

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

[commit-bot: I haz the power, 2015-03-31 01:05:17]

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 Russell (switch to Gerrit), 2015-03-31 02:01:30]

kbr@chromium.org changed reviewers:
+ piman@chromium.org, sievers@chromium.org

[Ken Russell (switch to Gerrit), 2015-03-31 02:01:30]

piman or sievers: OWNERS review please.

[piman, 2015-03-31 04:03:58]

lgtm

[Dirk Pranke, 2015-03-31 04:20:24]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2015-03-31 04:20:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1041363002/60001

[commit-bot: I haz the power, 2015-03-31 04:24:20]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-03-31 04:25:03]

Patchset 4 (id:??) landed as
https://crrev.com/e0422842dc0deae15c616006ada98782d2a67b40
Cr-Commit-Position: refs/heads/master@{#322976}