/usr/lib/x86_64-linux-gnu/libhidapi-libusb.so is in libhidapi-dev 0.8.0~rc1+git20140201.3a66d4e+dfsg-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libhidapi-libusb.so.0.0.0