title: android studio: Unable to recreate missing debug keystore
body: <p>I've installed the android studio (0.4) on my ubuntu machine. Trying to run a "hello world" application I got the follwing error message:</p>
  
  <blockquote>
    <p>Execution failed for task ':myApp:validateDebugSigning'.
    Unable to recreate missing debug keystore.</p>
  </blockquote>
  
  <p>The ~/.android/ doesn't contain any keystore file.</p>
  
  <p>Does anybody know how I can resolve that issue?</p>