[scenekit] Avoid breaking change (missing !) (#4126)

src/SceneKit/SCNPhysicsShape.cs

@@ -32,7 +32,7 @@ namespace SceneKit
 			return Create (shapes, t);
 		}
 
-#if XAMCORE_4_0
+#if !XAMCORE_4_0
 		[Obsolete ("Use the 'Create' method that takes a 'SCNMatrix4 []'.")]
 		public static SCNPhysicsShape Create (SCNPhysicsShape [] shapes, SCNVector3 [] transforms)
 		{