/usr/lib/python2.7/dist-packages/swift-1.4.8.egg-info/SOURCES.txt is in python-swift 1.4.8-0ubuntu2.5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/swift-1.4.8.egg-info/../../../../share/pyshared/swift-1.4.8.egg-info/SOURCES.txt