Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "prototypes: xci: xci-deploy.sh: Append trailing slash for rsync vars"
  - prototypes: xci: xci-deploy.sh: Append trailing slash for rsync vars

    The 'synchronize' Ansible module uses rsync and for that we need
    to indicate that we want to copy the contents of the development path
    and not the development path itself. As such we need to ensure that a
    trailing slash is always appended to the user variables but we need to
    also ensure that we will not end up with double slashes.

    Change-Id: I0103b754585931fa1dcd3966c52d7e4a8f2f63f6
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 8ffb5e9..25974ad 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 8ffb5e97c5303fb74cf96c64434642ac016afc21
+Subproject commit 25974adfe75c75c79d6586fddba5c3e379fd741e