GN: Work on Mac module search path.

GN: Work on Mac module search path.

This hooks up the rpath for Mac executables. This fixes a bug in iOS GYP generation where the architectures were specified as a string instead of a list.

Also fixes some base files that were out-of-sync from the GYP build.

BUG=345021
TBR=thakis

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=253952

[brettw, 2014-02-27 20:44:14]

Nico is on vacation -> Scott.

[scottmg, 2014-02-27 20:53:09]

On 2014/02/27 20:44:14, brettw wrote:
> Nico is on vacation -> Scott.

I don't know what those flags do, might as well just tbr Nico.

[brettw, 2014-02-27 21:24:35]

TBR=thakis

[brettw, 2014-02-27 22:46:46]

Committed patchset #1 manually as r253952 (presubmit successful).

[Nico, 2014-03-03 21:18:09]

lgtm

https://codereview.chromium.org/179873008/diff/1/build/config/mac/BUILD.gn
File build/config/mac/BUILD.gn (right):

https://codereview.chromium.org/179873008/diff/1/build/config/mac/BUILD.gn#ne...
build/config/mac/BUILD.gn:30: # On Mac, this is used only for executables.
common.gypi says

                # Turn on position-independence (ASLR) for executables. When
                # PIE is on for the Chrome executables, the framework will
                # also be subject to ASLR.

which might be interesting to mention.

common.gypi also doesn't do this for valgrind builds – I guess you don't care
about valgrind yet?