title: proguard gradle debug build but not the tests
body: <p>I enabled proguard for the debug build using:</p>
  
  <pre><code>android {
      buildTypes {
          debug {
              runProguard true
              proguardFile 'proguard-debug.txt'
          }
          release {
              runProguard true
              proguardFile 'proguard-project.txt'
              zipAlign true
          }
      }
  }
  </code></pre>
  
  <p>The problem I'm experiencing when I do this is that the gradle build wants to proguard the tests during the proguardDebugTest task as well. I can't seem to modify to get access to this particular task. Is there a way I can proguard the debug apk but not the test apk? </p>