test(symbols): Track the symbols we export from the angular library
test(symbols): Track the symbols we export from the angular library

Closes #398

giovannicandido/angular.dart,SibuStephen/angular.dart,SibuStephen/angular.dart,trinarytree/angular.dart,winstonewert/angular.dart,hitesh97/angular.dart,trinarytree/angular.dart,ronlobo/angular.dart,hitesh97/angular.dart,rkirov/angular.dart,rkirov/angular.dart,SibuStephen/angular.dart,ronlobo/angular.dart,winstonewert/angular.dart,winstonewert/angular.dart,rkirov/angular.dart,winstonewert/angular.dart,giovannicandido/angular.dart,hitesh97/angular.dart,hitesh97/angular.dart,SibuStephen/angular.dart,ronlobo/angular.dart,ronlobo/angular.dart,giovannicandido/angular.dart,trinarytree/angular.dart,trinarytree/angular.dart,rkirov/angular.dart