/usr/lib/x86_64-linux-gnu/libtomahawk-widgets.so is in libtomahawk-dev 0.8.4+dfsg1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libtomahawk-widgets.so.0.8.4
/usr/lib/x86_64-linux-gnu/libtomahawk-widgets.so.0.8.4