title: Error:Execution failed for task ':app:clean'
body: <p>i need your help, when i try to compile my new app without any addition of dependences and classpath i get this exception</p>
  
  <ul>
  <li>android studio ver 21.1</li>
  <li><p>ubuntu 15.4 32bit</p>
  
  <p><strong>Error Execution failed for task app clean.</strong></p>
  
  <blockquote>
    <p>Unable to delete directory: .../app/build/intermediates/exploded-aar/com.android.support/animated-vector-drawable/23.4.0/jars</p>
  </blockquote></li>
  </ul>