/usr/share/doc/linux-tools-4.4.0-47-lowlatency/changelog.Debian.gz is in linux-tools-4.4.0-47-lowlatency 4.4.0-47.68.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/linux-tools-4.4.0-47-lowlatency/../linux-tools-4.4.0-47/changelog.Debian.gz