Support mscorlib that forwards System.Enum and System.ValueType to another assembly (as .NETCore reference mscorlib does).

reflect/Type.cs

@@ -1909,7 +1909,10 @@ namespace IKVM.Reflection
 
 		private bool ResolvePotentialEnumOrValueType()
 		{
-			if (this.Assembly == this.Universe.Mscorlib || this.Assembly.GetName().Name.Equals("mscorlib", StringComparison.OrdinalIgnoreCase))
+			if (this.Assembly == this.Universe.Mscorlib
+				|| this.Assembly.GetName().Name.Equals("mscorlib", StringComparison.OrdinalIgnoreCase)
+				// check if mscorlib forwards the type (.NETCore profile reference mscorlib forwards System.Enum and System.ValueType to System.Runtime.dll)
+				|| this.Universe.Mscorlib.FindType(new TypeName(__Namespace, __Name)) == this)
 			{
 				typeFlags = (typeFlags & ~TypeFlags.PotentialEnumOrValueType) | TypeFlags.EnumOrValueType;
 				return true;