Update git submodules

* Update docs/submodules/releng from branch 'master'
  to a30200767b553b8fcbfff6077df937428be99338
  - Add BUILD_TAG in url prefix

    It eases collecting the results for third-party compliance/conformance.

    Change-Id: I36fa7c60815de8090a234f32d696d24870465252
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 96cd16c..a302007 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 96cd16c6427891037c63d37a4f4f5aa55cbd0e38
+Subproject commit a30200767b553b8fcbfff6077df937428be99338