Update GN to the latest version

Update GN to the latest version

The latest GN version allow .o files for GN generated inputs, which is
needed for the native GN sysroot build.

BUG=#619
R=kulakowski@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/a8adeba2e48f2fc5f8a89b39dc637dbab474bab7

[Petr Hosek, 2016-01-23 00:55:19]

Description was changed from

==========
Update GN to the latest version

BUG=#619
==========

to

==========
Update GN to the latest version

The latest GN version allow .o files for GN generated inputs, which is
needed for the native GN crt build.

BUG=#619
==========

[Petr Hosek, 2016-01-23 00:55:19]

phosek@chromium.org changed reviewers:
+ kulakowski@chromium.org

[Petr Hosek, 2016-01-23 00:56:23]

Description was changed from

==========
Update GN to the latest version

The latest GN version allow .o files for GN generated inputs, which is
needed for the native GN crt build.

BUG=#619
==========

to

==========
Update GN to the latest version

The latest GN version allow .o files for GN generated inputs, which is
needed for the native GN sysroot build.

BUG=#619
==========

[kulakowski, 2016-01-25 19:16:56]

lgtm

[Petr Hosek, 2016-01-25 22:16:20]

Description was changed from

==========
Update GN to the latest version

The latest GN version allow .o files for GN generated inputs, which is
needed for the native GN sysroot build.

BUG=#619
==========

to

==========
Update GN to the latest version

The latest GN version allow .o files for GN generated inputs, which is
needed for the native GN sysroot build.

BUG=#619
R=kulakowski@chromium.org

Committed:
https://chromium.googlesource.com/external/mojo/+/a8adeba2e48f2fc5f8a89b39dc6...
==========

[Petr Hosek, 2016-01-25 22:16:21]

Committed patchset #1 (id:1) manually as
a8adeba2e48f2fc5f8a89b39dc637dbab474bab7 (presubmit successful).