/usr/share/doc/libxqilla-dev/changelog.Debian.gz is in libxqilla-dev 2.3.0-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libxqilla-dev/../libxqilla6/changelog.Debian.gz
/usr/share/doc/libxqilla-dev/../libxqilla6/changelog.Debian.gz