Change baseURI for Packages to avoid 404

Summary: Without this change, the landing page for the Packages app is https://secure.phabricator.com/packages, which is a 404. There's probably a better way to fix this, but this was the fewest characters.

Test Plan: doitlive

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D21494

src/applications/packages/application/PhabricatorPackagesApplication.php

@@ -15,7 +15,7 @@ final class PhabricatorPackagesApplication extends PhabricatorApplication {
   }
 
   public function getBaseURI() {
-    return '/packages/';
+    return '/packages/package/';
   }
 
   public function getIcon() {