Update git submodules

* Update docs/submodules/releng from branch 'master'
  to fb0806e38744b393e9931421fe2eb6117d586bc3
  - Merge "Add missing sudo calls"
  - Add missing sudo calls

    It modifies airship, cntt and xtesting jjbs.

    Change-Id: If9f8d301262764312a46b7fa6e24220d96fc30bf
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 569c74f..fb0806e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 569c74f86e0148a1dfef6709856d9609c3f068de
+Subproject commit fb0806e38744b393e9931421fe2eb6117d586bc3