/usr/lib/x86_64-linux-gnu/libwnck-3.so.0 is in libwnck-3-0 3.4.9-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libwnck-3.so.0.2.2
/usr/lib/x86_64-linux-gnu/libwnck-3.so.0.2.2