Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Add user guide about install from source code

    Change-Id: Ieb4bbada9cd6375f4583a7cdc4ad7d995d2b6780
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 27e8671..5e8a66c 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 27e86710e8d6080cda9e0121a0ff38275785cb7f
+Subproject commit 5e8a66c2d8e6c7c5b04321379fd25a8c0604098a