/usr/arm-linux-gnueabi/lib/libgnarl-8.so is in gnat-8-arm-linux-gnueabi 8-20180414-1ubuntu2cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/arm-linux-gnueabi/lib/libgnarl-8.so.1
/usr/arm-linux-gnueabi/lib/libgnarl-8.so.1