This file is indexed.

/usr/aarch64-linux-gnu/lib/libgnat-8.so is in gnat-8-aarch64-linux-gnu 8-20180414-1ubuntu2cross1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/aarch64-linux-gnu/lib/libgnat-8.so.1