/usr/share/doc/linux-cloud-tools-4.2.0-25-lowlatency/changelog.Debian.gz is in linux-cloud-tools-4.2.0-25-lowlatency 4.2.0-25.30~14.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/linux-cloud-tools-4.2.0-25-lowlatency/../linux-lts-wily-cloud-tools-4.2.0-25/changelog.Debian.gz