/usr/lib/x86_64-linux-gnu/libwayland-client.so is in libwayland-dev 1.12.0-1~ubuntu16.04.3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0
/usr/lib/x86_64-linux-gnu/libwayland-client.so.0.3.0