Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Clean up CI Node Listing for pushing test logs"
  - Clean up CI Node Listing for pushing test logs

    These machines have been removed from Jenkins for quite some time and
    no longer need to be listed here.

    Change-Id: I43943865eb83eccdf26effe916d6c2ac010f402f
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a8d59a5..d7c9390 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a8d59a5b4163078e00ea9f56d666a64815468e07
+Subproject commit d7c9390a4434f030914b78b9c2a44f7673b5b63f