Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 1641bf59bdde4338f6a7d6992eeaa24a84d9f20e
  - Create both master and stable jobs

    Change-Id: I1d0497333bc0ab357ee469d70f65aecc5e1d2516
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 97e1a8c..1641bf5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 97e1a8c7a37e20598327fd9dd2c8d3798db2b0de
+Subproject commit 1641bf59bdde4338f6a7d6992eeaa24a84d9f20e