Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Functest jobs are not showing up

    Remove and then re-add to see if we can get jjb merge to work

    Change-Id: Iff380b38bbc5a69e2850cd91a99267b6d5b1128f
    Signed-off-by: agardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 915fa66..64f150e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 915fa6616ac00461ba28732669a6d7e320a3e090
+Subproject commit 64f150ecdd4055f4b3f817b204fee04d9527386b