[PATCH 1/2 v2] mscoree: add stub for CorIsLatestSvc to hint user at broken .NET installation

[Vincent Povirk]

> +    hr =  pCorIsLatestSvc(&unk1, &unk2);
> +    ok(hr == S_OK, "CorIsLatestSvc returned %08x\n", hr);

Does it really make sense to test this, given that we have no way of
knowing the true function prototype and no reason to implement it?