Update git submodules

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

    Change-Id: I68cdb0ba44b6296207ebdd9129f33220962d4bc0
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>
    (cherry picked from commit dfc9aacb02fe0e428bd82b39c5365183561909e4)

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 0c8fdfa..818294f 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 0c8fdfafa8a85dd6e25497a9f9af9694e75ee4a1
+Subproject commit 818294f56577a81f50325ca828451abf580fc8c5