/usr/lib/x86_64-linux-gnu/libXaw7.so is in libxaw7-dev 2:1.0.12-2+b1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libXaw7.so.7.0.0
/usr/lib/x86_64-linux-gnu/libXaw7.so.7.0.0