/usr/lib/python2.7/dist-packages/zc.i18n-0.7.0.egg-info/namespace_packages.txt is in python-zc.i18n 0.7.0-0ubuntu5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/zc.i18n-0.7.0.egg-info/../../../../share/pyshared/zc.i18n-0.7.0.egg-info/namespace_packages.txt