/usr/share/doc/linux-tools-3.19.0-33-generic/changelog.Debian.gz is in linux-tools-3.19.0-33-generic 3.19.0-33.38~14.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/linux-tools-3.19.0-33-generic/../linux-lts-vivid-tools-3.19.0-33/changelog.Debian.gz