Update notes for submitted changes

* Increase bazel timeout for long running tests
* Use bazelisk to switch between used bazel version
* Bump minimum Bazel version to 0.26.1
* Bazel: Bump skylib library version to 0.8.0

03/f7618fab26409e1a510fd118cf6a6ea7a9e677

@@ -0,0 +1,7 @@
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Verified+1: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Mon, 10 Jun 2019 17:41:59 -0400
+Reviewed-on: https://git.eclipse.org/r/143584
+Project: jgit/jgit
+Branch: refs/heads/master

95/de60594ed6fdbc2ac6eaebe114be71c171c038

@@ -0,0 +1,8 @@
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Verified+1: Matthias Sohn <matthias.sohn@sap.com>
+Code-Review+2: Jonathan Nieder <jrn@google.com>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Mon, 10 Jun 2019 17:41:59 -0400
+Reviewed-on: https://git.eclipse.org/r/143583
+Project: jgit/jgit
+Branch: refs/heads/master

d8/429d27f7867ad400112584b5581ed741e1c3ec

@@ -0,0 +1,7 @@
+Code-Review+2: Jonathan Nieder <jrn@google.com>
+Verified+1: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Mon, 10 Jun 2019 17:41:59 -0400
+Reviewed-on: https://git.eclipse.org/r/143648
+Project: jgit/jgit
+Branch: refs/heads/master

df/616520d77acf0a0722a75e6b7b3653d78b0b0d

@@ -0,0 +1,7 @@
+Code-Review+2: Jonathan Nieder <jrn@google.com>
+Verified+1: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Mon, 10 Jun 2019 17:41:59 -0400
+Reviewed-on: https://git.eclipse.org/r/143582
+Project: jgit/jgit
+Branch: refs/heads/master