[Mac/iOS/GN] Add //build/toolchain/mac/filter_libtool.py.

[Mac/iOS/GN] Add //build/toolchain/mac/filter_libtool.py.

This moves another step performed by gyp-mac-tool into a standalone script.

BUG=616813
R=sdefresne@chromium.org

Committed: https://crrev.com/88e841406ed2bcd559882c79ef254dac12f9c2a3
Cr-Commit-Position: refs/heads/master@{#397770}

[sdefresne, 2016-06-03 07:50:21]

lgtm

[Robert Sesek, 2016-06-03 14:05:52]

rsesek@chromium.org changed reviewers:
+ dpranke@chromium.org

[Robert Sesek, 2016-06-03 14:05:54]

+dpranke for OWNERS

[Dirk Pranke, 2016-06-03 18:00:29]

lgtm

[Robert Sesek, 2016-06-03 18:02:22]

The CQ bit was checked by rsesek@chromium.org

[commit-bot: I haz the power, 2016-06-03 18:02:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2033503003/1

[commit-bot: I haz the power, 2016-06-03 19:09:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-03 19:10:57]

Description was changed from

==========
[Mac/iOS/GN] Add //build/toolchain/mac/filter_libtool.py.

This moves another step performed by gyp-mac-tool into a standalone script.

BUG=616813
R=sdefresne@chromium.org
==========

to

==========
[Mac/iOS/GN] Add //build/toolchain/mac/filter_libtool.py.

This moves another step performed by gyp-mac-tool into a standalone script.

BUG=616813
R=sdefresne@chromium.org

Committed: https://crrev.com/88e841406ed2bcd559882c79ef254dac12f9c2a3
Cr-Commit-Position: refs/heads/master@{#397770}
==========

[commit-bot: I haz the power, 2016-06-03 19:10:58]

Patchset 1 (id:??) landed as
https://crrev.com/88e841406ed2bcd559882c79ef254dac12f9c2a3
Cr-Commit-Position: refs/heads/master@{#397770}