Update git submodules

* Update docs/submodules/releng from branch 'master'
  - [Apex] Move Functest Scenario selection to script

    When using 'shell' builder directly '{}' is interpreted as a JJB
    substitution. This can be escaped with '{{}}' but breaks due to Apex
    use of Jinja2. Moving the entire script to a shell fixes this issue.

    Change-Id: I874a45cf25ca69373275849f98c89c534f3de0bb
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f815ee4..532d544 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f815ee40627b33c71a22a8df29789d7d8b991bb8
+Subproject commit 532d544beffedc438c6cc7f2f59d1880d05c779d