/usr/share/doc/tomcat8/changelog.Debian.gz is in tomcat8 8.0.32-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/tomcat8/../libtomcat8-java/changelog.Debian.gz
/usr/share/doc/tomcat8/../libtomcat8-java/changelog.Debian.gz