/usr/lib/gcc-cross/arm-linux-gnueabi/4.9/libgo.so is in gccgo-4.9-arm-linux-gnueabi 4.9.3-13ubuntu2cross1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/gcc-cross/arm-linux-gnueabi/4.9/../../../../arm-linux-gnueabi/lib/libgo.so.5