/usr/share/doc/libxvmc1-dbg/changelog.Debian.gz is in libxvmc1-dbg 2:1.0.6-1ubuntu2.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libxvmc1-dbg/../libxvmc1/changelog.Debian.gz
/usr/share/doc/libxvmc1-dbg/../libxvmc1/changelog.Debian.gz