/usr/lib/gcc-cross/powerpc64-linux-gnu/6/libgo.so is in gccgo-6-powerpc64-linux-gnu 6.3.0-18cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/gcc-cross/powerpc64-linux-gnu/6/../../../../powerpc64-linux-gnu/lib/libgo.so.9