Update git submodules

* Update docs/submodules/releng from branch 'master'
  - jjb: xci: xci-set-scenario.sh: Fix conditional for default scenario

    We only set default scenario if there is not one set already so we
    need to check if the array is empty.

    Change-Id: Ic5019fb68349adaf52d669aed43574bc5eaeddc3
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index fbdd451..8299421 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit fbdd4518f772e71316548ecd16b94a879873f650
+Subproject commit 8299421a82f682a351f9fb1be8b988dc07161317