Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Cleanup customizable variables of workspace

    Change-Id: I00185b7c73692e2aeafb1307cea81f4f2d149c74
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 6144eac..b1683c0 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 6144eac326d14e26bbb849abea51c4cf7f3881b6
+Subproject commit b1683c050b3e603378c57a21a7851dac432111b7