Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 115d1a70d3f6fc1ac00595cf3f7f20bb338f4f1c
  - Allow building security container in jerma

    Change-Id: I9d2b30071d021666f7a095f00b846dab0497a107
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f1b7367..115d1a7 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f1b7367cfebf4263e9d24d9dc9800b54f2d5d89c
+Subproject commit 115d1a70d3f6fc1ac00595cf3f7f20bb338f4f1c