Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "create a tar file for logs"
  - create a tar file for logs

    JIRA: DOVETAIL-479

    User may want to upload all logs along with the results,
    so others may check the running logs to make sure what' s going on during the test.

    Change-Id: Ice906264bbdf091d3353d6d2e146653aeb057f5f
    Signed-off-by: grakiss <grakiss.wanglei@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 9173249..4ee77d5 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 917324958d10cc0e82226a0eac721312b88367c1
+Subproject commit 4ee77d5799f1ba5011d11a576a25bdcaeac74187