Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "fix the bug of patch verify"
  - fix the bug of patch verify

    If one patch don't modify the "yml" or "yaml" file,
    the script will exit with 1 at egrep "ya?ml$", then mark build as failure.
    In my opinion, if not modify the "yml" or "yaml" file, the yamllint should be successful.
    So we need mark the result of egrep "ya?ml$" as true, then judge the $YAML_FILES.

    Change-Id: I8abcadc9e4c85935ac7b20cdf54713b9800108ba
    Signed-off-by: wutianwei <wutianwei1@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 3dda830..9f7a3ac 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 3dda8300a72a04c5630939d5ae16ac4fc5d2d6ec
+Subproject commit 9f7a3ac83c62035d0b8f1e0adc27296db8a3e31c