/usr/share/doc/linux-tools-3.16.0-28-lowlatency/changelog.Debian.gz is in linux-tools-3.16.0-28-lowlatency 3.16.0-28.38~14.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/linux-tools-3.16.0-28-lowlatency/../linux-lts-utopic-tools-3.16.0-28/changelog.Debian.gz