chore(Gruntfile): remember to minify ngMessages

Author: matsko

Gruntfile.js

@@ -221,6 +221,7 @@ module.exports = function(grunt) {
       animate: 'build/angular-animate.js',
       cookies: 'build/angular-cookies.js',
       loader: 'build/angular-loader.js',
+      messages: 'build/angular-messages.js',
       touch: 'build/angular-touch.js',
       resource: 'build/angular-resource.js',
       route: 'build/angular-route.js',