Update git submodules

* Update docs/submodules/releng from branch 'master'
  to b3386c5e48bfb5b56314268e841eae589f90396c
  - Remove sig_network_features

    Change-Id: If9accfe3886f1908a212844b3439cdcea915534a
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 9aac45a..b3386c5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 9aac45a0fe0313c0bfe9d913165a03fc9f495e0c
+Subproject commit b3386c5e48bfb5b56314268e841eae589f90396c