Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Fix argument typo in example configuration

    Change-Id: Ia8edbfe1c00808da0375640a84ab18f5edb2224f
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index ed593ae..0ce21bc 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit ed593ae626b626889ebe27ab1e91ada253c70aab
+Subproject commit 0ce21bc2fc83faa3462de9fd52360cb0d6fae71d