Update git submodules

* Update docs/submodules/releng from branch 'master'
  - jjb: xci: Fix functest exit code

    There is not reason to grep the logs for failures because we can simply
    preserve the functest exit code and use that to determine whether the
    job passed or not.

    Change-Id: I9f027960fd3d9d452d417b95e9dac66bbb314a47
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index aa362e7..e876599 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit aa362e7b865f463cce253cd321d68aced919c2b6
+Subproject commit e876599edaaa4ab25a8f4160ef9dc7b3cc97b62f