Update git submodules

* Update docs/submodules/releng from branch 'master'
  to a7c4b42c835048599ce24c6d2ab03205bd7c6a50
  - Merge "Fix element path"
  - Fix element path

    Change-Id: Ic1efc2d0ef8bc09ace0efa4011300b7d04baf970
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 6fb5303..a7c4b42 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 6fb5303ee043ff4768bf92a927b66840bf80b3ce
+Subproject commit a7c4b42c835048599ce24c6d2ab03205bd7c6a50