/usr/lib/x86_64-linux-gnu/libfwupd.so is in libfwupd-dev 0.7.0-0ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libfwupd.so.1.0.1
/usr/lib/x86_64-linux-gnu/libfwupd.so.1.0.1