/usr/share/doc/linux-cloud-tools-3.13.0-30-lowlatency/changelog.Debian.gz is in linux-cloud-tools-3.13.0-30-lowlatency 3.13.0-30.55.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/linux-cloud-tools-3.13.0-30-lowlatency/../linux-cloud-tools-3.13.0-30/changelog.Debian.gz