Sort GYP and GN files under ppapi

Sort GYP and GN files under ppapi

For tools/sort_sources.py to be useful, existing GYP and GN files
should be sorted.

BUG=456014
TEST=everything should build as before

Committed: https://crrev.com/c96d5d2b62b03bae7a3812b441d1470755f7a376
Cr-Commit-Position: refs/heads/master@{#316434}

[satorux1, 2015-02-16 06:12:31]

satorux@chromium.org changed reviewers:
+ raymes@chromium.org

[raymes, 2015-02-16 06:16:12]

lgtm

[satorux1, 2015-02-16 06:44:21]

The CQ bit was checked by satorux@chromium.org

[commit-bot: I haz the power, 2015-02-16 06:45:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/930753002/20001

[commit-bot: I haz the power, 2015-02-16 07:09:48]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-16 07:10:36]

Patchset 2 (id:??) landed as
https://crrev.com/c96d5d2b62b03bae7a3812b441d1470755f7a376
Cr-Commit-Position: refs/heads/master@{#316434}