Tiny fix for sloppy function map 'name' descriptor attributes

I can't actually figure out how to trigger a change in behavior here,
but it looks like we should be passing the same attributes both to
the accessor and the descriptor.

R=verwaest@chromium.org

Review-Url: https://codereview.chromium.org/2616843005
Cr-Commit-Position: refs/heads/master@{#42149}

src/factory.cc

@@ -2678,7 +2678,7 @@ void Factory::SetFunctionInstanceDescriptor(Handle<Map> map,
 
   STATIC_ASSERT(JSFunction::kNameDescriptorIndex == 1);
   Handle<AccessorInfo> name =
-      Accessors::FunctionNameInfo(isolate(), ro_attribs);
+      Accessors::FunctionNameInfo(isolate(), roc_attribs);
   {  // Add name.
     Descriptor d = Descriptor::AccessorConstant(
         Handle<Name>(Name::cast(name->name())), name, roc_attribs);