Update notes for submitted changes

* Add debug trace for FileSnapshot

09/fec1a1024ab70322ab14ebd2f7aa4313c7c2e3

@@ -0,0 +1,7 @@
+Code-Review+2: David Pursehouse <david.pursehouse@gmail.com>
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Submitted-by: Christian Halstrick <christian.halstrick@sap.com>
+Submitted-at: Wed, 17 Jul 2019 09:49:08 -0400
+Reviewed-on: https://git.eclipse.org/r/145873
+Project: jgit/jgit
+Branch: refs/heads/stable-5.1