title: Error adding lwjgl-opengles to gradle
body: <p>I want to use lwjgl-opengles in my android application.
  When I add in Gradle:</p>
  
  <pre><code>dependencies {
      compile fileTree(include: ['*.jar'], dir: 'libs')
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:appcompat-v7:24.2.1'
      compile 'org.lwjgl:lwjgl-opengles:3.1.0'
  }
  </code></pre>
  
  <p>I get the following error when compiling:</p>
  
  <pre><code>Error:Execution failed for task ':app:transformResourcesWithMergeJavaResForDebug'.
  &gt; com.android.build.api.transform.TransformException: com.android.builder.packaging.DuplicateFileException: Duplicate files copied in APK META-INF/INDEX.LIST
      File1: /root/.gradle/caches/modules-2/files-2.1/org.lwjgl/lwjgl-opengles/3.1.0/34022551efca063f31282f9952c29bdd41cb3c15/lwjgl-opengles-3.1.0.jar
      File2: /root/.gradle/caches/modules-2/files-2.1/org.lwjgl/lwjgl/3.1.0/fae7a04425666311d5dfe5ef7d89021ca0308d8d/lwjgl-3.1.0.jar
  </code></pre>
  
  <p>How to solve this problem? Thank you!</p>