Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Add timeout and timestamp for long duration tasks"
  - Add timeout and timestamp for long duration tasks

    Change-Id: Ib4b07e23a81718e759ed43ff7fa2882735804afc
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 2525e29..3cb1db9 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 2525e2973f1386761c6a3222d5c349789665717e
+Subproject commit 3cb1db94be6f1dda34d26679f2ed127552dd709d