Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "keep methods' name/docstring after decorator"
  - keep methods' name/docstring after decorator

    applying functools.wraps() to keep the name and docstring
    of the original function which is decorated

    Change-Id: Id612039921566dd48f8d8797abe30f23aaf99301
    Signed-off-by: SerenaFeng <feng.xiaowei@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 7c1b8bf..d4d7b58 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 7c1b8bf89d6ce3ec0114c103e6d62161eb12a071
+Subproject commit d4d7b5821f6d9a783bed651441b9f73c5cf64cbc