do not remove root folder when unzipping gradlew zip packagee

Author: codeanticode

mode/src/processing/mode/android/AndroidBuild.java

@@ -968,7 +968,7 @@ private File createTempBuildFolder(final Sketch sketch) throws IOException {
 
   private void installGradlew(File exportFolder) throws IOException {
     File gradlewFile = mode.getContentFile("mode/gradlew.zip");
-    AndroidUtil.extractFolder(gradlewFile, exportFolder, false, true);
+    AndroidUtil.extractFolder(gradlewFile, exportFolder, false);
     if (Platform.isMacOS() || Platform.isLinux()) {
       File execFile = new File(exportFolder, "gradlew");    
       execFile.setExecutable(true);