/usr/lib/x86_64-linux-gnu/libwnck-1.so is in libwnck-dev 1:2.30.7-5.1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libwnck-1.so.22.3.31
/usr/lib/x86_64-linux-gnu/libwnck-1.so.22.3.31