marshal-ilgen component must be included

[naricc]

After this change to mono, marshal-ilgen has been moved to a component: dotnet/runtime#71203. This is a step in eventually allowing the component to be dropped when not needed (reducing the runtime size by around 100kb). For now, it must be available to the runtime. So it needs to be added here before this change is consumed by xamarin-macios.

@dalexsoto

[dalexsoto]

Thanks @naricc, can you work with @rolfbjarne on this?

Thanks!

[rolfbjarne]

Fixed here: 62055c5