Fix difference on behavior on python 2.6 on linux with open(mode='rU').
Fix difference on behavior on python 2.6 on linux with open(mode='rU').

TBR=cmp@chromium.org
BUG=
TEST=manually tested gclient sync works on linux with python 2.6


Review URL: https://chromiumcodereview.appspot.com/10694069

git-svn-id: bd64dd6fa6f3f0ed0c0666d1018379882b742947@145315 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

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