Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Add more comprehensive document example"
  - Add more comprehensive document example

    Change-Id: Ia414c692c7f91c4e071cdb4fb19637eb10adf11c
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index e0eb036..13dc765 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit e0eb036625dc8b964033053ce7e32bfebb8ceb46
+Subproject commit 13dc7659e55ac6f569422fd194e35f8fdc189180