Update notes for submitted changes

* reftable: increment pointer *after* reading uint16
* reftable: test absense of prefix matching in Reflog
* reftable: enforce ordering for ref and log writes
* reftable: add some more comments

81/801d6f965bacaed6c044ed26b5119043eb2133

@@ -0,0 +1,8 @@
+Code-Review+1: Ivan Frade <ifrade@google.com>
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: Jonathan Tan <jonathantanmy@google.com>
+Submitted-by: Jonathan Tan <jonathantanmy@google.com>
+Submitted-at: Mon, 19 Aug 2019 12:32:56 -0400
+Reviewed-on: https://git.eclipse.org/r/146814
+Project: jgit/jgit
+Branch: refs/heads/master

9f/9163cbcace9729eec181c0b2f1313a12fcb0b4

@@ -0,0 +1,7 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: Jonathan Tan <jonathantanmy@google.com>
+Submitted-by: Jonathan Tan <jonathantanmy@google.com>
+Submitted-at: Mon, 19 Aug 2019 12:32:56 -0400
+Reviewed-on: https://git.eclipse.org/r/146799
+Project: jgit/jgit
+Branch: refs/heads/master

ca/3b4b608340218e15d45479c424794e95bfb316

@@ -0,0 +1,7 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: Jonathan Tan <jonathantanmy@google.com>
+Submitted-by: Jonathan Tan <jonathantanmy@google.com>
+Submitted-at: Mon, 19 Aug 2019 12:32:56 -0400
+Reviewed-on: https://git.eclipse.org/r/146788
+Project: jgit/jgit
+Branch: refs/heads/master

d7/ee5aafee7c4eabeea6de8dd125a1ad4ddcdc0f

@@ -0,0 +1,8 @@
+Code-Review+1: Ivan Frade <ifrade@google.com>
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: Jonathan Tan <jonathantanmy@google.com>
+Submitted-by: Jonathan Tan <jonathantanmy@google.com>
+Submitted-at: Mon, 19 Aug 2019 12:32:56 -0400
+Reviewed-on: https://git.eclipse.org/r/147281
+Project: jgit/jgit
+Branch: refs/heads/master