Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Fix package missing on debian hosts

    Change-Id: I4cc5c78f1b33f17234bbcf4864b01c550dc0e487
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 941eb36..d550122 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 941eb361d74e71114c97e8de240e224d2ea2d8ef
+Subproject commit d550122312110e9db8759a4dc52ace8b230373db