Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Hunter stable branch for Yardstick"
  - Hunter stable branch for Yardstick

    Hunter stable branch for Yardstick

    Change-Id: I35dafe101ce61498b326e67fdfba1e6708ff6747
    Signed-off-by: rexlee8776 <limingjiang@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 2fd603c..2ccb910 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 2fd603cea14d27de96b9d85ac5d5bf3098d807fd
+Subproject commit 2ccb910a377d9a073645dfa95b575cfea9e823f9