[NaCl SDK] Add a very simple getting_started example at top-level.

native_client_sdk/src/examples/getting_started/hello_world/example.js

Index: native_client_sdk/src/examples/getting_started/hello_world/example.js
diff --git a/native_client_sdk/src/examples/getting_started/hello_world/example.js b/native_client_sdk/src/examples/getting_started/hello_world/example.js
deleted file mode 100644
index 7f269215feeca51b5b79857d6e6260e80695bc97..0000000000000000000000000000000000000000
--- a/native_client_sdk/src/examples/getting_started/hello_world/example.js
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Once we load, hide the plugin
-function moduleDidLoad() {
-  common.hideModule();
-}
-
-// Called by the common.js module.
-function handleMessage(message) {
-  common.logMessage(message.data);
-}