/usr/arm-linux-gnueabihf/lib/libgdruntime.so.76 is in libgphobos76-armhf-cross 8-20180414-1ubuntu2cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/arm-linux-gnueabihf/lib/libgdruntime.so.76.0.2