/usr/lib/x86_64-linux-gnu/liboil-0.3.so is in liboil0.3-dev 0.3.17-2ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/liboil-0.3.so.0.3.0
/usr/lib/x86_64-linux-gnu/liboil-0.3.so.0.3.0