This CL adds the egg distribution of setuptools to third_party. A follow-up CL will use this to install various required third-party eggs in a depot_tools/site-packages directory.

TBR=maruel@chromium.org
BUG=
TEST=


Review URL: http://codereview.chromium.org/8953018

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@114635 0039d316-1c4b-4281-b951-d872f2087c98