Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 1ca7b55423fe27db97ee626f621bd5d996cb3506
  - update global-jjb to latest version

    It's an attempt to reuse lf-build5

    Change-Id: I3cae8f4d6f5eef733e52cfff1ece72c50d5e03be
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b1cc145..1ca7b55 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b1cc145842b96c832bf34eb403293ff327a857d8
+Subproject commit 1ca7b55423fe27db97ee626f621bd5d996cb3506