Add class name as a valid strategy for non-Web platforms

lib/devices/common.js

@@ -201,13 +201,13 @@ exports.checkValidLocStrat = function(strat, includeWeb, cb) {
     'xpath',
     'id',
     'name',
-    'dynamic'
+    'dynamic',
+    'class name'
   ];
   if (includeWeb) {
     validStrats = validStrats.concat([
       'link text',
       'css selector',
-      'class name',
       'partial link text'
     ]);
   }