chore(ng-closure-runner): upgrade to version 0.2.4

Version 0.2.4's `minErr` implementation is up to date with the one in core.

Fixes #14971

Closes #15307

bower.json

@@ -6,6 +6,6 @@
     "jquery-2.2": "jquery#2.2.4",
     "jquery-2.1": "jquery#2.1.4",
     "closure-compiler": "https://dl.google.com/closure-compiler/compiler-20140814.zip",
-    "ng-closure-runner": "https://raw.github.com/angular/ng-closure-runner/v0.2.3/assets/ng-closure-runner.zip"
+    "ng-closure-runner": "https://raw.github.com/angular/ng-closure-runner/v0.2.4/assets/ng-closure-runner.zip"
   }
 }