Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Only Allow ASCII Characters in JJB Scripts

    Since Jenkins job builder doesn't support unicode yet, any non-ascii
    character will break the releng-merge-jjb job.

    Change-Id: Idc50c258c9c00c8d594717364907e701d9fee385
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 77b9e3e..941759d 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 77b9e3e5787e39fd44a9dcfb73e128e02a32d4e6
+Subproject commit 941759da987a3d24d9eee704c83163c8931359b9