/usr/lib/libxenstore.so.3.0 is in libxenstore3.0 4.4.2-0ubuntu0.14.04.14.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libxenstore.so.3.0.3
/usr/lib/libxenstore.so.3.0.3