title: Webpack html-webpack-plugin load favicons in template
body: <p>I'm using Webpack with <code>html-webpack-plugin</code> and their provided template. 
  I want to add a list of favicons in the header: </p>
  
  <pre><code>&lt;link rel="apple-touch-icon" sizes="57x57" href="&lt;%= htmlWebpackPlugin.extraFiles.apple-touch-icon-57x57 %&gt;"&gt;
  &lt;link rel="apple-touch-icon" sizes="60x60" href="&lt;%= htmlWebpackPlugin.extraFiles.favicons.fav60%&gt;"&gt;
  &lt;link rel="apple-touch-icon" sizes="72x72" href="&lt;%= htmlWebpackPlugin.extraFiles.favicons.fav72%&gt;"&gt;
  &lt;link rel="apple-touch-icon" sizes="76x76" href="favicons/apple-touch-icon-76x76.png"&gt;
  &lt;link rel="apple-touch-icon" sizes="114x114" href="favicons/apple-touch-icon-114x114.png"&gt;
  &lt;link rel="apple-touch-icon" sizes="120x120" href="favicons/apple-touch-icon-120x120.png"&gt;
  &lt;link rel="apple-touch-icon" sizes="144x144" href="favicons/apple-touch-icon-144x144.png"&gt;
  &lt;link rel="apple-touch-icon" sizes="152x152" href="favicons/apple-touch-icon-152x152.png"&gt;
  &lt;link rel="apple-touch-icon" sizes="180x180" href="favicons/apple-touch-icon-180x180.png"&gt;
  &lt;link rel="icon" type="image/png" href="favicons/favicon-32x32.png" sizes="32x32"&gt;
  &lt;link rel="icon" type="image/png" href="favicons/android-chrome-192x192.png" sizes="192x192"&gt;
  &lt;link rel="icon" type="image/png" href="favicons/favicon-96x96.png" sizes="96x96"&gt;
  &lt;link rel="icon" type="image/png" href="favicons/favicon-16x16.png" sizes="16x16"&gt;
  &lt;link rel="manifest" href="favicons/manifest.json"&gt;
  &lt;link rel="mask-icon" href="favicons/safari-pinned-tab.svg" color="#e53935"&gt;
  &lt;meta name="msapplication-TileColor" content="#da532c"&gt;
  &lt;meta name="msapplication-TileImage" content="favicon/mstile-144x144.png"&gt;
  &lt;meta name="theme-color" content="#e53935"&gt;
  </code></pre>
  
  <p>How can I include all the favicons in my webpack build, with or without <code>html-webpack-plugin</code>?</p>
  
  <p>I tried adding them as extraFiles like the docs say, but they don't end up in my build folder. </p>
  
  <p><em>Note: The first 3 was me trying to something that didn't work.</em> </p>