Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Update release note to Danube 2.0

    Change-Id: I33eb6321d0349ab636ee99b616c7d326cc88d604
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>
    (cherry picked from commit c868680eb17c2a7f86cb794e1cf15330f21dd3cd)

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 4a01c0e..b1d0ab7 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 4a01c0eeb1c31239b9194999997210e04b437ddd
+Subproject commit b1d0ab704574bf0c819e6a265849d0096abc6093