Bug 1244042 - Set actions as a member of `this` in order to support b2g; r=ato

testing/marionette/actions.js

@@ -14,7 +14,7 @@ this.EXPORTED_SYMBOLS = ["actions"];
 
 const logger = Log.repository.getLogger("Marionette");
 
-const actions = {};
+this.actions = {};
 
 /**
  * Functionality for (single finger) action chains.