Retab Android plugin.

Author: damonkohler

gradle_plugins/src/main/groovy/org/ros/gradle_plugins/RosAndroid.groovy

@@ -9,7 +9,7 @@ import java.util.HashMap
  */
 class RosAndroidPlugin implements Plugin<Project> {
 
-	void apply(Project project) {
+  void apply(Project project) {
     project.apply plugin: "ros"
     project.extensions.create("rosandroid", RosAndroidPluginExtension)
     project.rosandroid.buildToolsVersion = "18.1.1"