Update notes for submitted changes

* Fix NarrowingCompoundAssignment warnings from Error Prone
* FS_POSIX: handle Files.getFileStore() failures

72/ae0892066fb4875136cf77c624194e394c0856

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+Code-Review+1: Thomas Wolf <thomas.wolf@paranor.ch>
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Thu, 08 Aug 2019 08:58:30 -0400
+Reviewed-on: https://git.eclipse.org/r/144686
+Project: jgit/jgit
+Branch: refs/heads/stable-5.4

ae/fb11298c36960c4ae49fa830c8a93f1171f52f

@@ -0,0 +1,7 @@
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Thu, 08 Aug 2019 08:58:30 -0400
+Reviewed-on: https://git.eclipse.org/r/145451
+Project: jgit/jgit
+Branch: refs/heads/stable-5.4