Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "add develop guide for testapi"
  - add develop guide for testapi

    Change-Id: Iaa9c15092aafda2024f08c467eea2f3ab9cddd96
    Signed-off-by: SerenaFeng <feng.xiaowei@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 68294f0..0709a0b 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 68294f08d466e5e59195158556e26a098685dc5d
+Subproject commit 0709a0bc668df263465a97adf0bf4e6ba7aa8b4c