title: Problem with "react-native-vector-icons" in React native
body: <p>I install this library :</p>
  
  <pre><code>npm install react-native-vector-icons
  </code></pre>
  
  <p>and link it</p>
  
  <pre><code>react native link
  </code></pre>
  
  <p>and i import it to my project</p>
  
  <pre><code>import Icon from 'react-native-vector-icons/Ionicons'
  </code></pre>
  
  <p>then i use it in render part of the component like this :</p>
  
  <pre><code>&lt;Icon name={'ios-person-outline'} /&gt;
  </code></pre>
  
  <p>But when i run the android app there is no error but the icon is a qustion icon 
  eny body has idea ?</p>