/usr/lib/x86_64-linux-gnu/libsystemd.so is in libsystemd-dev 215-17+deb8u7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libsystemd.so.0.3.1
/lib/x86_64-linux-gnu/libsystemd.so.0.3.1