/usr/share/doc/libv8-3.14-dbg/changelog.Debian.gz is in libv8-3.14-dbg 3.14.5.8-5ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libv8-3.14-dbg/../libv8-3.14.5/changelog.Debian.gz