Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "correct arithmetic baseline"
  - correct arithmetic baseline

    These two number are reversed.

    Change-Id: I8d97820528e8b0bfa72cb0dfb596707f8cfd5a43
    Signed-off-by: zhihui wu <wu.zhihui1@zte.com.cn>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 8c97097..c990f1d 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 8c9709746a7650b85b733afe1d3a9fa2e5a6cf43
+Subproject commit c990f1d1915c8666c1793b141b2d37e1e2fdaf1d