Update git submodules

* Update docs/submodules/clover from branch 'master'
  - Merge "Move design document to dedicated folder"
  - Move design document to dedicated folder

    Change-Id: I20c85b7116cd2b29d0efcaae5ee0b0381a685bbb
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/clover b/docs/submodules/clover
index c68b7b8..e7a7870 160000 (submodule)
--- a/docs/submodules/clover
+++ b/docs/submodules/clover
@@ -1 +1 @@
-Subproject commit c68b7b8380ea8d2ac4da6b4739c6b8e157bb952b
+Subproject commit e7a7870f5c16740f6bb2c2ae9d9752b9a2920a0b