Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[Clover] Add docker build job for sample-app"
  - [Clover] Add docker build job for sample-app

    Change-Id: Iac612137bd4b1a45550849c3180525cfe74f4a7f
    Signed-off-by: Junaid Ali <junaidali.yahya@gmail.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 76d94ae..f6c35f7 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 76d94ae33e47f091d1e82d15396d0786955520a8
+Subproject commit f6c35f72246e2b9883e91945a601742d8c2224bd