/usr/lib/x86_64-linux-gnu/libvorbisfile.so is in libvorbis-dev 1.3.4-2+deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libvorbisfile.so.3.3.6
/usr/lib/x86_64-linux-gnu/libvorbisfile.so.3.3.6