Adds the ability for 'copies' in Xcode project files to specify the 'Code Sign on Copy' option.

Adds the ability for 'copies' in Xcode project files to specify the 'Code Sign on Copy' option.

Relanding change landed in svn:
https://codereview.chromium.org/956203005/

Original author: mattryavec@google.com

BUG=None
R=mark@chromium.org, thakis@chromium.org

Committed: https://chromium.googlesource.com/external/gyp/+/a5bd08f286297d3dac5ff4fd27a97e7961412513

[bradn, 2015-03-02 18:11:44]

bradnelson@google.com changed reviewers:
+ mark@chromium.org, thakis@chromium.org

[Mark Mentovai, 2015-03-02 18:13:37]

Can you copy the issue description as it landed in svn, with the attribution to
the original committer and original review URL?

[bradn, 2015-03-02 18:21:23]

bradnelson@google.com changed reviewers:
+ mattryavec@google.com

[bradn, 2015-03-02 18:22:29]

This was the commit message from that commit.

I've added a link to the old review and a reference to the original author.

[Mark Mentovai, 2015-03-02 18:46:27]

LGTM

[bradn, 2015-03-02 18:55:07]

Committed patchset #1 (id:1) manually as
a5bd08f286297d3dac5ff4fd27a97e7961412513.