Update git submodules

* Update docs/submodules/releng from branch 'master'
  to a94f032a7b36b148728cd5bdf6fb32bcf0ca2ef3
  - Switch xena to lf-pod4-2

    Change-Id: I8b24db14920149a1e9eb117a3ccc0cc8cb3e6650
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 844e9a8..a94f032 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 844e9a86d6f4114f228c7b70ddf26c25e952dac5
+Subproject commit a94f032a7b36b148728cd5bdf6fb32bcf0ca2ef3