/usr/lib/libgnome-menu-3.so is in libgnome-menu-3-dev 3.10.1-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libgnome-menu-3.so.0.0.1
/usr/lib/libgnome-menu-3.so.0.0.1