Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge workspace files into one folder

    Change-Id: Ie8d0e8fdd6d6c212701ba1ee10b1d05da1ccca22
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 6827bf2..e6da674 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 6827bf2d62ac0935369a86b87782f404ac413570
+Subproject commit e6da6749be6e5143855a48c866de2cd03789d2e8