/usr/share/doc/libmedia-hub-client5/changelog.Debian.gz is in libmedia-hub-client5 4.1.0+16.04.20160308.2-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libmedia-hub-client5/../libmedia-hub-common5/changelog.Debian.gz