Update git submodules

* Update docs/submodules/releng from branch 'master'
  to c9fe57ceabe86831ec21f417ca2e7461d4586455
  - armband: Disable master branch

    armband jobs should no longer be triggered since all aarch64 changes are
    now upstream in Fuel.

    Change-Id: I6add84b691dbd36c87468df0fc154e3a692a6a8b
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index e25b274..c9fe57c 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit e25b2749b31cec9a9cba208b3a75d95367a49d16
+Subproject commit c9fe57ceabe86831ec21f417ca2e7461d4586455