/usr/share/doc/liblz4-dev/changelog.Debian.gz is in liblz4-dev 0.0~r131-2ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/liblz4-dev/../liblz4-1/changelog.Debian.gz
/usr/share/doc/liblz4-dev/../liblz4-1/changelog.Debian.gz