/usr/x86_64-linux-gnu/libx32/libgdruntime.so.71 is in libx32gphobos71-amd64-cross 7.3.0-16ubuntu3cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/x86_64-linux-gnu/libx32/libgdruntime.so.71.0.2