/usr/lib/x86_64-linux-gnu/libxatracker.so is in libxatracker-dev 10.3.2-1+deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libxatracker.so.2.2.0
/usr/lib/x86_64-linux-gnu/libxatracker.so.2.2.0