Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 4b2b8fa0289411c77b2c5887b8837d0630c9599f
  - Merge "Run all cnf test cases if latest arm"
  - Run all cnf test cases if latest arm

    cnf-conformance is skipped if needed.

    Change-Id: I44c3dae66c8ae755cbd058e76329ffa753dead3f
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 0a7bbf9..4b2b8fa 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 0a7bbf9c464b2647ea9cef65f734c126f6dc0f45
+Subproject commit 4b2b8fa0289411c77b2c5887b8837d0630c9599f