/usr/lib/x86_64-linux-gnu/libeio.so is in libeio-dev 1.7.7-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libeio.so.1.7.7
/usr/lib/x86_64-linux-gnu/libeio.so.1.7.7