Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 50859d48eaab6df333e965bffc74b3b72ce70470
  - Make a change to trigger branch creation

    Change-Id: Ia58e68b660977974d5acf45742989f0a7cba65fc
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 806b799..50859d4 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 806b799923c20056491151bdcd780dab4865c70e
+Subproject commit 50859d48eaab6df333e965bffc74b3b72ce70470