[turbofan] Stub for typeof operator.

src/crankshaft/s390/lithium-codegen-s390.cc

Index: src/crankshaft/s390/lithium-codegen-s390.cc
diff --git a/src/crankshaft/s390/lithium-codegen-s390.cc b/src/crankshaft/s390/lithium-codegen-s390.cc
index 3e6aff5a8e70bc5db909a75161a2abdcef8fbd6f..82d174dee76665e0ccc0cf768229dc58d17fc991 100644
--- a/src/crankshaft/s390/lithium-codegen-s390.cc
+++ b/src/crankshaft/s390/lithium-codegen-s390.cc
@@ -5353,8 +5353,8 @@ void LCodeGen::DoTypeof(LTypeof* instr) {
   __ mov(r2, Operand(isolate()->factory()->number_string()));
   __ b(&end);
   __ bind(&do_call);
-  TypeofStub stub(isolate());
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+  Callable callable = CodeFactory::Typeof(isolate());
+  CallCode(callable.code(), RelocInfo::CODE_TARGET, instr);
   __ bind(&end);
 }