/usr/share/doc/linux-cloud-tools-4.8.0-54-lowlatency/changelog.Debian.gz is in linux-cloud-tools-4.8.0-54-lowlatency 4.8.0-54.57~16.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/linux-cloud-tools-4.8.0-54-lowlatency/../linux-hwe-cloud-tools-4.8.0-54/changelog.Debian.gz