Update git submodules

* Update docs/submodules/clover from branch 'master'
  - Bug fix in SDC after istio to 1.0.0

    JIRA: CLOVER-84

    There will be some Bug in SDC after we upgrade the Istio to 1.0.0
    Istio 1.0 have some concept, for example : virtualservice gateway.
    So we change the yaml file using the 1.0.0 concepts.
    Add mirror function

    Change-Id: Id138cfec2c7d94b44eb508a056c91e193ac1b08b
    Signed-off-by: Ace Lee <liyin11@huawei.com>

diff --git a/docs/submodules/clover b/docs/submodules/clover
index c7e0f16..907d2d1 160000 (submodule)
--- a/docs/submodules/clover
+++ b/docs/submodules/clover
@@ -1 +1 @@
-Subproject commit c7e0f161092e6affccf50e4faf59d6eef4f4314d
+Subproject commit 907d2d1b0ab1c82552b9805df8bf39c1a55b5281