Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Update Functest jobs to manage new branches"
  - Update Functest jobs to manage new branches

    It manages stable/gambia and stable/hunter as well.

    Change-Id: Ib259995f8f0e45767a51204c4eb6fd239e66ed92
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index c20919f..1c4cc03 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit c20919f1f430cfbad1238a6d74b9c782f696732d
+Subproject commit 1c4cc0319e5b1c37b9221b776ea264cacf8f1478