title: webpack not including file in bundle
body: <p>Webpack is not including a dependency of a dependency.
  This leaf dependency is required using <code>require('entry?name-of-dep')</code>.</p>
  
  <p>And <code>webpack.config.js</code>:</p>
  
  <pre><code>module: {
      loaders: [
        {
          test: /\.html$/,
          loader: 'raw-loader'
        },
        {
          exclude: [/\.html$/, /(node_modules|bower_components)/],
          loader: 'babel-loader',
          query: {
            presets: 'es2015',
          }
        }
      ]
    }
  </code></pre>
  
  <p>In the output bundle, the dependency missing is as:</p>
  
  <pre><code>/* 38 */
  /***/ function(module, exports) {
  
      /* (ignored) */
  
  /***/ }
  </code></pre>
  
  <p>What am I missing?</p>