Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "unify raise exception process"
  - unify raise exception process

    Change-Id: I109ef9550a57e218b6f5c9196812b33133d34134
    Signed-off-by: SerenaFeng <feng.xiaowei@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 85eba2e..8eb68cf 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 85eba2eafa62f00eb3c28bb9968e89bcaba5e73e
+Subproject commit 8eb68cff96445dc53ee1c232b565aa4a61d0a526