Update git submodules

* Update docs/submodules/releng from branch 'master'
  to c2a94c860717f7d57e8f17fab12aac4b05d65356
  - Build docker container on lf-build2 (2/2)

    ericsson-build4 seems in a bad shape

    Change-Id: Ia7868f656f0c1a363074bd8e4e739b4f2f568cf8
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index ea0d87c..c2a94c8 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit ea0d87c0ecd4daf814968cef9d2236f866163fe7
+Subproject commit c2a94c860717f7d57e8f17fab12aac4b05d65356