Update git submodules

Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Fix bug that start_job script exit unexpectedly

    When `set -o errexit` is enabled in script, the non-zero return value
    from `diff` is considered as an error. But actually diff returns 1 when
    difference is found. The error exit option should be disabled when dealing
    `diff`.

    Change-Id: I6270ec8f7036b3d752736a80474468e26a613585
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>