add RegisterAuxAssembly for compat with loader wrapper

Torch/TorchBase.cs

@@ -395,5 +395,15 @@ namespace Torch
 
         /// <inheritdoc/>
         public event TorchGameStateChangedDel GameStateChanged;
+
+        #region Backwards compat
+
+        [Obsolete("Dont use that", true)]
+        internal static void RegisterAuxAssembly(Assembly assembly)
+        {
+            TorchLauncher.RegisterAssembly(assembly);
+        }
+
+        #endregion
     }
 }