Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Committers please vote +2/-2 for PTL nomination of Zhihui Wu"
  - Committers please vote +2/-2 for PTL nomination of Zhihui Wu

    Change-Id: If3d5dfa5ec215c0360df70fc674e54be511a0857
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index f066800..37e548e 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit f0668006bfd9ede5a275b0b40ef054962e7d8839
+Subproject commit 37e548ea8166350d9eab50e512248d32d351862c