Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 63f9569b21de275831ce545474fa35740076949e
  - Chown output dirs

    Change-Id: I8fcd5876246a99ac153c211b8d3886f9410b6409
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 689837d..63f9569 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 689837ddc374c33148e43bcaf64e5ea363928244
+Subproject commit 63f9569b21de275831ce545474fa35740076949e