Update git submodules

* Update docs/submodules/clover from branch 'master'
  - Merge "Fix error in logging installation"
  - Fix error in logging installation

    It must be done in two steps otherwise the mixer adapter may not
    be initialized correctly.

    Change-Id: Ie59e811fc287fbd52a007be45f0f9c74983149b3
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/clover b/docs/submodules/clover
index a611041..e634c7b 160000 (submodule)
--- a/docs/submodules/clover
+++ b/docs/submodules/clover
@@ -1 +1 @@
-Subproject commit a611041d138a71a87c12d4734e5d1a780852ecc9
+Subproject commit e634c7ba2046ce6881a78fc35060927e2b0b0670