/usr/share/doc/linux-cloud-tools-3.19.0-47-lowlatency/changelog.Debian.gz is in linux-cloud-tools-3.19.0-47-lowlatency 3.19.0-47.53~14.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/linux-cloud-tools-3.19.0-47-lowlatency/../linux-lts-vivid-cloud-tools-3.19.0-47/changelog.Debian.gz