Migrate android project to crosswalk+cordova bundle

mobile/cordova/lib/clean.js

@@ -0,0 +1,39 @@
+#!/usr/bin/env node
+
+/*
+       Licensed to the Apache Software Foundation (ASF) under one
+       or more contributor license agreements.  See the NOTICE file
+       distributed with this work for additional information
+       regarding copyright ownership.  The ASF licenses this file
+       to you under the Apache License, Version 2.0 (the
+       "License"); you may not use this file except in compliance
+       with the License.  You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+       Unless required by applicable law or agreed to in writing,
+       software distributed under the License is distributed on an
+       "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+       KIND, either express or implied.  See the License for the
+       specific language governing permissions and limitations
+       under the License.
+*/
+
+var build = require('./build'),
+    spawn = require('./spawn'),
+    path  = require('path');
+
+/*
+ * Cleans the project using ant
+ * Returns a promise.
+ */
+module.exports.run = function() {
+    var args = build.getAntArgs('clean');
+    return spawn('ant', args);
+}
+
+module.exports.help = function() {
+    console.log('Usage: ' + path.relative(process.cwd(), process.argv[1]));
+    console.log('Cleans the project directory.');
+    process.exit(0);
+}