Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Create release note for Danube 1.0

    Change-Id: I68cdb0ba44b6296207ebdd9129f33220962d4bc0
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index f6b8615..dfc9aac 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit f6b8615a4e69a908f4637a23d98214c960347701
+Subproject commit dfc9aacb02fe0e428bd82b39c5365183561909e4