Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Remove the offline scripts

    As we discussed in Dovetail weekly meeting, there is no need to maintain
    all the offline scripts.

    Change-Id: I360d1a211856626af91310f142c1777a77398a12
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 0a59d94..7f46996 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 0a59d949b74ed509542dbe454de8d0fc4314ac27
+Subproject commit 7f46996011d391178b7d9f876ac2140f62dcf789