[cca]Add the [email protected] for cca

Add cordova-android 6.0.0 explicitly for cca build.

Impacted tests(approved): new 0, update 2, delete 0
Unit test platform: Crosswalk Project for Android 23.53.589.0
Unit test result summary: pass 2, fail 0, block 0

BUG=https://crosswalk-project.org/jira/browse/CTS-1916

cordova/cordova-sampleapp-android-tests/sampleapp/comm.py

@@ -209,7 +209,7 @@ def buildGoogleApp(appname, sourcecodepath, self):
     os.chdir(os.path.join(tool_path, appname))
 
     print "Add android platforms to this project --------------> START"
-    add_android_cmd = "cca platform add android"
+    add_android_cmd = "cca platform add android@6.0.0"
     addstatus = commands.getstatusoutput(add_android_cmd)
     self.assertEquals(0, addstatus[0])
 

tools/build/pack_cordova_sample.py

@@ -530,7 +530,7 @@ def packGoogleApp(app_name=None):
         '</widget>',
         '    <allow-navigation href="*" />\n</widget>')
 
-    add_cmd = "cca platform add android"
+    add_cmd = "cca platform add android@6.0.0"
     if not doCMD(add_cmd, DEFAULT_CMD_TIMEOUT * 2):
         os.chdir(orig_dir)
         return False