TEST_MAPPING - system_update_engine - Gitiles

 {
   "presubmit": [
     {
       "name": "update_engine_unittests"
     },
     {
       "name": "update_engine_http_unittests"
     }
   ]
 }
	{
	"presubmit": [
	{
	"name": "update_engine_unittests"
	},
	{
	"name": "update_engine_http_unittests"
	}
	]
	}