Yay, s390x support is finally in mainline! Finally we (SUSE) no longer needs to use gcc-go to build Go binaries on some platforms (we've had nothing but issues

Yay, s390x support is finally in mainline! Finally we (SUSE) no longer needs to use gcc-go to build Go binaries on some platforms (we've had nothing but issues from gcc-go, half of the patches we apply to Docker are to make it behave when built with SLE's gcc version).