title: Build gradle : Could not find method packagingOptions() for arguments root Project "fasterDev"
body: <p>I am using single build.gradle file in application.
  Regarding version 1.6 it's working properly.
  but I want to use this for location update with module.</p>
  
  <pre><code>apply plugin: 'com.android.application'
  ...
  
  dependencies {
      compile 'com.google.android.gms:play-services:fp9.0.0'
  }
  </code></pre>
  
  <p>Here is my build.gradle.</p>
  
  <p>build.gradle</p>
  
  <pre><code>buildscript {
      repositories {
          mavenCentral()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:2.1.0'
      }
  }
  apply plugin: 'android'
  
  dependencies {
      compile fileTree(dir: 'libs', include: '*.jar')
  }
  
  android {
      compileSdkVersion 15
      buildToolsVersion "21.1.2"
  
      sourceSets {
          main {
              manifest.srcFile 'AndroidManifest.xml'
              java.srcDirs = ['src']
              resources.srcDirs = ['src']
              aidl.srcDirs = ['src']
              renderscript.srcDirs = ['src']
              res.srcDirs = ['res']
              assets.srcDirs = ['assets']
          }
  
          // Move the tests to tests/java, tests/res, etc...
          instrumentTest.setRoot('tests')
  
          // Move the build types to build-types/&lt;type&gt;
          // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
          // This moves them out of them default location under src/&lt;type&gt;/... which would
          // conflict with src/ being used by the main source set.
          // Adding new build types or product flavors should be accompanied
          // by a similar customization.
          debug.setRoot('build-types/debug')
          release.setRoot('build-types/release')
      }
  
  }
  
  packagingOptions {
      exclude 'META-INF/DEPENDENCIES.txt'
      exclude 'META-INF/LICENSE.txt'
      exclude 'META-INF/NOTICE.txt'
      exclude 'META-INF/NOTICE'
      exclude 'META-INF/LICENSE'
      exclude 'META-INF/DEPENDENCIES'
      exclude 'META-INF/notice.txt'
      exclude 'META-INF/license.txt'
      exclude 'META-INF/dependencies.txt'
      exclude 'META-INF/LGPL2.1'
  }  
  </code></pre>
  
  <p>Any tutorial or suggestion for this?</p>
  
  <p>Logs:</p>
  
  <pre><code>org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:48)
  Caused by: org.gradle.api.internal.MissingMethodException: Could not find method packagingOptions() for arguments [build_b54s9k8r9uto6awxmkxnu2ipo$_run_closure3@3a2d3196] on root project 'fasterDev'.
      at org.gradle.api.internal.AbstractDynamicObject.methodMissingException(AbstractDynamicObject.java:68)
  </code></pre>