Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Cleanup DEVELOP.md"
  - Cleanup DEVELOP.md

    - remove unecessary content
    - move CLI develop guide to rst document

    Change-Id: I20b6f458aa13f1feb1764e6c4d096ec8a9dddf49
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index fe8d49e..6189a88 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit fe8d49ebb1b563a1831341b049090388281127d3
+Subproject commit 6189a88cdb5fb59bbb5933f22567fe1dda044f9f