Add tests for both universal_newlines=True and False.

Fix stdout+stderr on Windows to binary mode in the child test process to make
sure testing is done correctly.

R=dpranke@chromium.org
BUG=
TEST=manually tested on OSX, Windows, cygwin and ubuntu


Review URL: http://codereview.chromium.org/8472002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@109282 0039d316-1c4b-4281-b951-d872f2087c98