add hardwareidentifier print to example

Example/UIDeviceModelNames/ViewController.swift

@@ -15,6 +15,7 @@ class ViewController: UIViewController {
         super.viewDidLoad()
         // Do any additional setup after loading the view, typically from a nib.
         
+        print(UIDeviceModelNames.hardwareIdentifier)
         print(UIDeviceModelNames.modelName)
     }