Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Bugfix: Dovetail failed to upload results to artifacts

    That's mainly because of that
    1. The owner of all results files are root:root
    2. Sometimes there are some files that can only be read by root
    3. User jenkins failed to upload these files

    Solutions:
    1. Change the owner to be jenkins:jenkins
    2. Remove these files which are useless for users

    Change-Id: I0b5e72e8d5045c7e0d64e32a13ba559612460a84
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 523d67b..42ecdb8 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 523d67bd309294cf3bf9f6ad1c68481c7ef2ae4c
+Subproject commit 42ecdb8cc7f847da54c76a4e6b6a4ef32347b81e