Update notes for submitted changes

* Reduce memory held and speed up DfsGarbageCollector.

7f/bd6588bed5e5dbed01ad2c85797d86596e5b71

@@ -0,0 +1,9 @@
+Code-Review+2: Shawn Pearce <sop@google.com>
+Code-Review+2: Colby Ranger <cranger@google.com>
+IP-Clean+1: Colby Ranger <cranger@google.com>
+Verified+1: Colby Ranger <cranger@google.com>
+Submitted-by: Colby Ranger <cranger@google.com>
+Submitted-at: Tue, 22 Jan 2013 18:55:36 -0500
+Reviewed-on: https://git.eclipse.org/r/9851
+Project: jgit/jgit
+Branch: refs/heads/master