Add @angular/upgrade/static to systemjs.config.js (angular#281)

Blocked by angular/angular.io#2781 and Angular 2.2.0.

Author: filipesilva

systemjs.config.js

@@ -23,6 +23,7 @@
       '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
       '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
       '@angular/upgrade': 'npm:@angular/upgrade/bundles/upgrade.umd.js',
+      '@angular/upgrade/static': 'npm:@angular/upgrade/bundles/upgrade-static.umd.js',
 
       // other libraries
       'rxjs':                      'npm:rxjs',