ninja/mac: Put dylibs directly into the product directory.

ninja/mac: Put dylibs directly into the product directory.

This matches xcode and make, and the chrome build depends on this.
Like http://codereview.chromium.org/7395025 , except that I'm now
also writing the test I should've written back then.

BUG=chromium:96894
Committed: http://code.google.com/p/gyp/source/detail?r=1133

[Evan Martin, 2012-01-06 18:50:00]

http://codereview.chromium.org/9139003/diff/3006/pylib/gyp/generator/ninja.py
File pylib/gyp/generator/ninja.py (right):

http://codereview.chromium.org/9139003/diff/3006/pylib/gyp/generator/ninja.py...
pylib/gyp/generator/ninja.py:733: # too.
Should we instead compute some sort of "output_dir" variable here and then use
in the below?  (That is, have some code here rather than this comment.)

Like:
dir = ''
if mac and other stuff:
  dir = ...
if some other thing
  dir = ...

The three line if condition below scares me.

[Nico, 2012-01-06 18:54:49]

http://codereview.chromium.org/9139003/diff/3006/pylib/gyp/generator/ninja.py
File pylib/gyp/generator/ninja.py (right):

http://codereview.chromium.org/9139003/diff/3006/pylib/gyp/generator/ninja.py...
pylib/gyp/generator/ninja.py:733: # too.
On 2012/01/06 18:50:00, Evan Martin wrote:
> Should we instead compute some sort of "output_dir" variable here and then use
> in the below?  (That is, have some code here rather than this comment.)

Done.

[Evan Martin, 2012-01-06 18:59:44]

LGTM