[Bug 1022983] Consider updating Rawhide to Go 1.2 release candidate

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1022983

--- Comment #15 from Matthew Miller  ---
And in the generated code, here is our unused "a":

void
_cgo_92e4c70c8af1_Cfunc_foo(void *v)
{
        struct {
                char unused;
        } __attribute__((__packed__, __gcc_struct__)) *a = v;
        foo();
}

Now, without going deeply into what that's all about, I've got no idea if this
is a bug or intentional in this test.