Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "jjb: xci: Make use of alternative ssh configuration file"
  - jjb: xci: Make use of alternative ssh configuration file

    The script now creates an XCI specific ssh configuration file
    so we need to use that when trying to connect to the host.

    Change-Id: I34cb39636b95de9ab97cb5d2ca250b4218e9a7f7
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 02ea067..93a0b35 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 02ea0678f840da4f63821c2753079263c6fcde11
+Subproject commit 93a0b352d15a82c80bdc1719dd24d9e0fd1a7821