feat(lint): now lint e2e ts files as well (#3941)

Author: delasteve

packages/angular-cli/blueprints/ng2/files/package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "ng": "ng",
     "start": "ng serve",
-    "lint": "tslint \"<%= sourceDir %>/**/*.ts\" --project src/tsconfig.json --type-check",
+    "lint": "tslint \"<%= sourceDir %>/**/*.ts\" --project src/tsconfig.json --type-check && tslint \"e2e/**/*.ts\" --project e2e/tsconfig.json --type-check",
     "test": "ng test",
     "pree2e": "webdriver-manager update --standalone false --gecko false",
     "e2e": "protractor"