[nem-en] Re: test-498.n failing

[Snaury]

Btw, mono seems to workaround it by something like this:

if((a.GetMethodImplOptions () & MethodImplOptions.InternalCall) != 0) {
  MethodBuilder.SetImplementationFlags
(MethodImplAttributes.InternalCall | MethodImplAttributes.Runtime);
}

I'm not sure whether it is correct or not though...