title: Duplicate files copied in APK AUTHORS
body: <p>when i am learning DataBinding ,i got the error like this`Execution failed for task ':app:transformResourcesWithMergeJavaResForDebug'.</p>
  
  <blockquote>
    <p>com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK AUTHORS
        File1: D:\WorkTools\Android_studio\gradle\m2repository\com\android\tools\external\lombok\lombok-ast\0.2.3\lombok-ast-0.2.3.jar
        File2: D:\WorkTools\Android_studio\gradle\m2repository\com\android\tools\external\lombok\lombok-ast\0.2.3\lombok-ast-0.2.3.jar`
    please help me!</p>
  </blockquote>