Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - bugfix of dockerfile

    Change-Id: I45b317e6feb4f889bd136b5d9f6a0f1e26db988f
    Signed-off-by: MatthewLi <matthew.lijun@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index ad04a05..041a51d 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit ad04a05327f0b9e5d668308ded7f440459b4b9b4
+Subproject commit 041a51d6d3ba5f2d9eabcf3501abb9af30ebc394