Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Avoid build conflicts in build server"
  - Avoid build conflicts in build server

    Currently each job in daisy project has multiple child jobs, which may
    block the resources in lf-build1 for the excutors are limited.

    Change-Id: I7977128a550421caaeda395fce04b91b31d35751
    Signed-off-by: Julien <zhang.jun3g@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 2bfc153..eab89fd 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 2bfc153956db44a47d4c58fa4bc4afc1c3b8a701
+Subproject commit eab89fda5f0fde5b8c608b7facb3f8d45970a8ec