[Bug 1326890] FTBFS with gcc-go on s390x

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1326890

--- Comment #3 from Dan Horák  ---
Created attachment 1147705
  --> https://bugzilla.redhat.com/attachment.cgi?id=1147705&action=edit
add s390x support

something like that should add the missing s390x support, but it fails to build
for me, it exceeds my Go foo :-)