/lib/x86_64-linux-gnu/libzADC.so is in libzadc-dev 4.0.12-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libzADC.so.1
/lib/x86_64-linux-gnu/libzADC.so.1