Update git submodules

* Update docs/submodules/releng from branch 'master'
  - jjb: xci: Turn on bash debug option

    The script does not behave as it should so we need to enable the debug
    option in order to debug it properly

    Change-Id: I13cd4d027c0d9bb9229466148ea4c913508cba2a
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 5d84427..3608656 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 5d844275d78eadc405058b61c291577635c94339
+Subproject commit 3608656e9155d07dabce5a10277245608908ee45