Update comment about additional_res_packages in java_apk.gypi

Update comment about additional_res_packages in java_apk.gypi

additional_res_dirs was removed and additional_res_packages does not use it
anymore.

Committed: https://crrev.com/d3938590973c69a6a05c223acfc2ea7d10d9f838
Cr-Commit-Position: refs/heads/master@{#315163}

[mstrum, 2015-02-06 17:31:02]

mstrum@amazon.com changed reviewers:
+ cjhopman@chromium.org

[mstrum, 2015-02-06 17:31:03]

PTAL

[cjhopman, 2015-02-07 01:11:09]

lgtm

[mstrum, 2015-02-07 01:12:32]

The CQ bit was checked by mstrum@amazon.com

[commit-bot: I haz the power, 2015-02-07 01:13:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/902193002/1

[commit-bot: I haz the power, 2015-02-07 02:34:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-07 02:34:46]

Patchset 1 (id:??) landed as
https://crrev.com/d3938590973c69a6a05c223acfc2ea7d10d9f838
Cr-Commit-Position: refs/heads/master@{#315163}