examples: hwconfig_console: Add .on()/.off() methods.

Add these methods to this "GPIO output emulated with console prints"
config.

examples/hwapi/hwconfig_console.py

@@ -8,6 +8,12 @@ class LEDClass:
     def value(self, v):
         print(self.id, v)
 
+    def on(self):
+        self.value(1)
+
+    def off(self):
+        self.value(0)
+
 
 LED = LEDClass(1)
 LED2 = LEDClass(12)