remove ez_setup import from setup.py

During the review for commit r1713 it was determined that ez_setup.py
was not going to be part of the commit.  While ez_setup.py was removed
as requested, the import and usage of ez_setup in setup.py was not
removed appropriately.  This change removes the import and usage so that
installing gyp via setuptools works as expected.

R=mark@chromium.org, scottmg@chromium.org

Review URL: https://codereview.chromium.org/24282003

Patch from Eric N. Vander Weele <ericvw@gmail.com>.

git-svn-id: http://gyp.googlecode.com/svn/trunk@1736 78cadc50-ecff-11dd-a971-7dbc132099af
ninja/mac: Allow per configuration SDKROOT.

This CL allows some flags to be per configuration instead of per target, so
iOS ninja can build simulator and device.

Make generator keeps its old behavior. Make doesn't know the build configuration
at gyp time and supporting this at build time is difficult.

R=thakischromium.org

Review URL: https://codereview.chromium.org/24080003



git-svn-id: http://gyp.googlecode.com/svn/trunk@1737 78cadc50-ecff-11dd-a971-7dbc132099af
ninja/mac: Fix _XcodeVersion parsing for Xcode 3.2. 

BUG=chromium:295322
Review URL: https://codereview.chromium.org/24243013/

Patch from Trent Apted <tapted@chromium.org>!



git-svn-id: http://gyp.googlecode.com/svn/trunk@1738 78cadc50-ecff-11dd-a971-7dbc132099af