Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 8dc895a15ce26fee7c86fb47a0ba3511971f4431
  - Create link as root

    Change-Id: I10e07320f98a20a77915b91051758263d909560a
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b409b17..8dc895a 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b409b171494cd381536adf93a1bbbba61638c1f4
+Subproject commit 8dc895a15ce26fee7c86fb47a0ba3511971f4431