Update list of Facade assemblies. (#916)

These assemblies were added here: 919b89954a

tools/linker/MobileProfile.cs

@@ -110,6 +110,9 @@ namespace Xamarin.Linker {
 			"System.Net.WebSockets.Client",
 			"System.Net.WebSockets",
 			"System.ObjectModel",
+			"System.Reflection.Emit.ILGeneration",
+			"System.Reflection.Emit.Lightweight",
+			"System.Reflection.Emit",
 			"System.Reflection.Extensions",
 			"System.Reflection.Primitives",
 			"System.Reflection.TypeExtensions",