Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 39aa635e75640cceddc55bc85ced7e482a865857
  - Merge "Add missing sudo"
  - Add missing sudo

    Change-Id: I891013d34da7b1fb3bea641bb7f582ee85c8db21
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 0aa470d..39aa635 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 0aa470d1a0c7c32f60cadd0e781470073166c6a0
+Subproject commit 39aa635e75640cceddc55bc85ced7e482a865857