Update git submodules

* Update docs/submodules/clover from branch 'stable/fraser'
  - Add section to help user understand how logging works

    Change-Id: Iebfb747450cc08e930eabd36a87670236b23ffff
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>
    (cherry picked from commit 8d3f6673e08d6b8c02f604791c6e42a399dc660

diff --git a/docs/submodules/clover b/docs/submodules/clover
index 106c87e..8278ade 160000 (submodule)
--- a/docs/submodules/clover
+++ b/docs/submodules/clover
@@ -1 +1 @@
-Subproject commit 106c87ed8b51ee9e202cc831f8d22d3f0c8240a9
+Subproject commit 8278adeda63d5cd9d70a20d0abb66d134d88be44