title: Gradle DSL method not found: 'runProguard'
body: <p>I get an error after updating from my last project. Not a problem in my code but I'm having trouble with build.gradle. How can I fix it?</p>
  
  <p>build.gradle code here: </p>
  
  <pre><code>apply plugin: 'android'
  
  android {
      compileSdkVersion 21
      buildToolsVersion '20.0.0'
  
      packagingOptions {
          exclude 'META-INF/DEPENDENCIES'
          exclude 'META-INF/LICENSE'
          exclude 'META-INF/LICENSE.txt'
          exclude 'META-INF/license.txt'
          exclude 'META-INF/NOTICE'
          exclude 'META-INF/NOTICE.txt'
          exclude 'META-INF/notice.txt'
          exclude 'META-INF/ASL2.0'
      }
  
      defaultConfig {
          applicationId 'com.xxx.axxx'
          minSdkVersion 14
          targetSdkVersion 19
          versionCode 6
          versionName '1.0'
      }
      buildTypes {
          release {
              runProguard false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
      productFlavors {
      }
  }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      compile 'com.android.support:appcompat-v7:19.+'
      compile files('libs/commons-codec-1.8.jar')
      compile files('libs/asmack-android-8-4.0.4.jar')
      compile 'com.android.support:support-v4:21.0.0'
      compile 'com.google.code.gson:gson:2.2.4'
      compile 'com.jakewharton:butterknife:5.1.1'
  }
  </code></pre>
  
  <p>Gradle Sync message output:</p>
  
  <pre><code>Error:(27, 0) Gradle DSL method not found: 'runProguard()'
  **Possible causes:
  The project 'Atomic4Mobile' may be using a version of Gradle that does not contain the method.
  **Gradle settings**
  The build file may be missing a Gradle plugin.
  **Apply Gradle plugin**
  </code></pre>