Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Do not redirect errors in ${redirect}

    ${redirect} can be equal to /dev/null.

    Change-Id: Ie66ee7ca2da92270de8619399a7f362acff8873a
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index ccd98e3..1bebb7f 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit ccd98e34b65d3273d2919e2aa7f90e8bfa8f89a2
+Subproject commit 1bebb7f5836e7fd44ada95ebb0798b67ff624ada