/usr/lib/x86_64-linux-gnu/libunwind-generic.so is in libunwind-dev 1.1-4.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libunwind-x86_64.so
/usr/lib/x86_64-linux-gnu/libunwind-x86_64.so