/usr/lib/gcc/x86_64-linux-gnu/4.7/32/libgo.so is in gccgo-4.7-multilib 4.7.0-0ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/gcc/x86_64-linux-gnu/4.7/32/../../../../../lib32/libgo.so.0