Update git submodules

* Update docs/submodules/releng from branch 'master'
  - xci: Switch to multijob for verify jobs

    Change-Id: Ic059a0eff23b203056cdb54cdd1ae2f17f01a09c
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 662b0b1..9f519d9 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 662b0b1127def80893933b3c941490a121f756a6
+Subproject commit 9f519d9fe4de5312965c957d9d52754ffec77e56