Add migration to WebAssembly information to PNaCl / NaCl docs.

native_client_sdk/doc_generated/sdk/examples.html

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-<span class="target" id="sdk-examples-2"></span><section id="examples">
+<span class="target" id="sdk-examples-2"></span><b><font color="#cc0000">
+NOTE:
+Deprecation of the technologies described here has been announced
+for platforms other than ChromeOS.<br/>
+Please visit our
+<a href="/native-client/migration">migration guide</a>
+for details.
+</font></b>
+<hr/><section id="examples">
 <h1 id="examples">Examples</h1>
 <p>Every Native Client SDK bundle comes with a folder of example applications.
 Each example demonstrates one or two key Native Client programming concepts.
 After you&#8217;ve <a class="reference internal" href="/native-client/sdk/download.html"><em>downloaded the SDK</em></a>, follow the instructions
 on this page to build and run the examples.</p>
 <p>Your version of Chrome must be equal to or greater than the version of your SDK
 bundle. For example, if you&#8217;re developing with the <code>pepper_35</code> bundle, you
 must use Google Chrome version 35 or greater. To find out what version of Chrome
 you&#8217;re using, type <code>about:chrome</code> or <code>about:version</code> in the Chrome address
 bar.</p>
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 </pre>
 <p>At this point, you can use the standard GDB commands to debug your NaCl module.
 The most common commands you will use to debug are <code>continue</code>, <code>step</code>,
 <code>next</code>, <code>break</code> and <code>backtrace</code>. See
 <a class="reference internal" href="/native-client/devguide/devcycle/debugging.html"><em>Debugging</em></a> for more information about
 debugging a Native Client application.</p>
 </section>
 
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