target/s390x: fix SIGNAL PROCESSOR return value

The SIGNAL PROCESSOR helper returns its value through the CC register.
set_cc_static should be called just after the helper.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170509082800.10756-3-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>

target/s390x/translate.c

@@ -3406,6 +3406,7 @@ static ExitStatus op_sigp(DisasContext *s, DisasOps *o)
     check_privileged(s);
     potential_page_fault(s);
     gen_helper_sigp(cc_op, cpu_env, o->in2, r1, o->in1);
+    set_cc_static(s);
     tcg_temp_free_i32(r1);
     return NO_EXIT;
 }