/usr/lib/x86_64-linux-gnu/libxcb-xf86dri.so is in libxcb-xf86dri0-dev 1.10-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libxcb-xf86dri.so.0.0.0
/usr/lib/x86_64-linux-gnu/libxcb-xf86dri.so.0.0.0