Update git submodules

* Update docs/submodules/releng from branch 'master'
  to f19d04e9fa965e4802a5190269c3badec8cb3e9d
  - Create Nile branches

    Change-Id: Iae8ff15b2999e48c03ac9fd1d130f32df99bbd31
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 0f7b214..f19d04e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 0f7b214d1b178bc4146dbd54ccd48f9fc9d9491e
+Subproject commit f19d04e9fa965e4802a5190269c3badec8cb3e9d