title: FileNotFoundException on proguard-rules.pro file
body: <p>I'm using Android Studio v.1.0 
  My build file : </p>
  
  <pre><code>  buildTypes {
  
      debug {
          minifyEnabled false
          proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  
      }
  
      release {
          minifyEnabled true
          proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
      }
  }
  </code></pre>
  
  <p>but when I try to make a release build, I get an error : 
  Error:Execution failed for task ':app:proguardRelease'.</p>
  
  <blockquote>
    <p>java.io.FileNotFoundException: F:....\app\proguard-rules.pro (File not found)</p>
  </blockquote>
  
  <p>I think, that proguard-android.txt is a part of Android SDK, am I right ? </p>
  
  <p>And why Android Studio can't find it ? </p>
  
  <p>I also tried proguard-android.pro - the same result</p>