Update git submodules

* Update docs/submodules/releng from branch 'master'
  - jjb: xci: Do not trigger the CI when patchset modifies the CI VM

    The scripts in xci/scripts/vm are used to manage the VM on the CI so
    we shouldn't blindly test a patch that modifies them. It's better to
    use manual inspection since that script rarely changes anyway.

    Change-Id: I48d81f984a1a8d1500be2cc74ea79420962b9a15
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index c633e80..e610bf1 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit c633e80356bb3b57d7cf337607cf61eab01908f9
+Subproject commit e610bf1a93d37f2c0f12fe22ed8d5129cefeb8ba