title: Artifact 'com.android.tools.build:gradle:0.12.1:gradle.jar' not found on Android Studio 0.8.1
body: <p>I've upgraded to Android Studio 0.8.1 and when I try to compile any app it fails with the following error:</p>
  
  <pre><code>Error:Artifact 'com.android.tools.build:gradle:0.12.1:gradle.jar' not found on Android Studio 0.8.1
  </code></pre>
  
  <p>I tried to update manually the plugin from gradle.org and it does not contain any gradle.jar binary.</p>
  
  <p>How to resolve this error?</p>