Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Add sphinx build configuration"
  - Add sphinx build configuration

    This allows local build of document for preview

    Change-Id: I9f70ad68358cdd5d47afebc9e440555c48a7c913
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 0a91309..ea7c246 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 0a913095a0888f4653e32150f6ffd9cb6a9e01ee
+Subproject commit ea7c2467b1c5d24ac56c41a2ab82355d01cf3cc2