/usr/lib/python2.7/dist-packages/lazr.enum-1.1.4.egg-info/SOURCES.txt is in python-lazr.enum 1.1.4-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/lazr.enum-1.1.4.egg-info/../../../../share/pyshared/lazr.enum-1.1.4.egg-info/SOURCES.txt