Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Fix error in py35"
  - Fix error in py35

    Change-Id: Iacc7bce9e1b5379907677d9fa0c26bf9c8ba155b
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 2fa6b51..ed6b634 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 2fa6b511f1a6c1a3372aacdacf7b6f68a4c72ddf
+Subproject commit ed6b63465482b30fd6cf995d2a3167a62a864346