Bug fix. It should be possible to import a function pointer type into a ModuleBuilder.

reflect/Emit/ModuleBuilder.cs

@@ -653,7 +653,7 @@ namespace IKVM.Reflection.Emit
 			int token;
 			if (!typeTokens.TryGetValue(type, out token))
 			{
-				if (type.HasElementType || type.IsGenericTypeInstance)
+				if (type.HasElementType || type.IsGenericTypeInstance || type.__IsFunctionPointer)
 				{
 					ByteBuffer spec = new ByteBuffer(5);
 					Signature.WriteTypeSpec(this, spec, type);