/usr/lib/x86_64-linux-gnu/libkwnn.so is in libkwnn-dev 1.1.1~a021+cvs20130302-7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libkwnn.so.0.0.0
/usr/lib/x86_64-linux-gnu/libkwnn.so.0.0.0