/usr/share/doc/linux-cloud-tools-3.16.0-25-generic/changelog.Debian.gz is in linux-cloud-tools-3.16.0-25-generic 3.16.0-25.33~14.04.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/linux-cloud-tools-3.16.0-25-generic/../linux-lts-utopic-cloud-tools-3.16.0-25/changelog.Debian.gz