chore(): add comment for clarity

Author: tlancina

lib/cli.js

@@ -150,6 +150,7 @@ function runWithGulp(argv, taskInstance){
         return Q.fcall(taskInstance.run.bind(taskInstance), Cli, argv);
       },
       function(e){ //task error, let gulp handle it
+        //if there is no hook task, but it's a v2 app and a command that usually needs a hook
         if (e.missingTask && /serve|build|run|emulate|upload/.test(cmdName) && argv.v2) {
           var taskName = (cmdName === 'serve') ? 'watch' : 'build';
           console.warn('WARN: No \'' + beforeHook + '\' gulp task found!');