/usr/lib/x86_64-linux-gnu/libspdylay.so is in libspdylay-dev 1.3.2-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libspdylay.so.7.2.0
/usr/lib/x86_64-linux-gnu/libspdylay.so.7.2.0