Update git submodules

* Update docs/submodules/releng from branch 'master'
  - [Functest] Fix nits in alpine jobs

    And add debug information for the suite jobs

    Change-Id: I478a09c689b54f82246a72c19726576ff5aeaffd
    Signed-off-by: Jose Lausuch <jalausuch@suse.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 78f4ee9..239ef51 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 78f4ee940f970ebcf2e9d76c4f0013c0cbf61bb4
+Subproject commit 239ef51c4e0bd7e5c918db258a662d99b5ff6d86