/usr/lib/x86_64-linux-gnu/liburfkill-glib.so is in liburfkill-glib-dev 0.6.0~20150318.103828.5539c0d.1-0ubuntu6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/liburfkill-glib.so.0.0.0