Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 61ee0fb0eec95c96101a5bb0f3d17891aaa83a7b
  - Add buid_tag in Airship and CNTT jobs

    It eases archiving all logs (third-party certification).

    Change-Id: I02c1d569e734dab71bd987a9bd57652243051b1a
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 20ec9ff..61ee0fb 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 20ec9ff5e9cf8fb9191561233f858a26f400d78f
+Subproject commit 61ee0fb0eec95c96101a5bb0f3d17891aaa83a7b