Update git submodules

* Update docs/submodules/qtip from branch 'stable/danube'
  - Merge "Replace Qtip with QTIP" into stable/danube
  - Replace Qtip with QTIP

    Change-Id: I4f187f86f5bb519d836864778f815fcea2fa9545
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 33dd7bd..c9b9ccb 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 33dd7bd8322d3224e382756ca83d0f6a4f02da06
+Subproject commit c9b9ccb05b965b4be816c4fd20ea251e1f6150aa