/usr/lib/gcc-cross/powerpc-linux-gnu/6/libgo.so is in gccgo-6-powerpc-linux-gnu 6.4.0-17ubuntu1cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/gcc-cross/powerpc-linux-gnu/6/../../../../powerpc-linux-gnu/lib/libgo.so.9