/usr/share/doc/autopilot-touch-legacy/changelog.Debian.gz is in autopilot-touch-legacy 1.4.1+15.10.20150911-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/autopilot-touch-legacy/../python-autopilot/changelog.Debian.gz