Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 76d3a4640f0ed4317367b9fbc8f2228558cc752e
  - Ask for sudo (from docker to shell)

    Change-Id: Ifc723e6f84edc91eaf23584135ca1bf16673f500
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index e035eda..76d3a46 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit e035eda547388df057a6f62255111acf1653c9e1
+Subproject commit 76d3a4640f0ed4317367b9fbc8f2228558cc752e