COMP: Wrap setuptools module installation to avoid false-positive error.

This commit ensure the build and install output of setuptools module is
redirected into files to avoid warning like the following one to be
falsely categorized as error:

15>removing 'build\bdist.win-amd64\egg' (and everything under it)
15>C:\D\C\Slicer-1-build\python-setuptools\setuptools\command\easy_install.py:316: UserWarning: Unbuilt egg for setuptools [unknown version] (c:\d\c\slicer-1-build\python-setuptools)
15> self.local_index = Environment(self.shadow_path + sys.path)

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23476 3bd1e089-480b-0410-8dfb-8563597acbee