Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "jjb: xci: xci-set-scenario: Drop errexit option"
  - jjb: xci: xci-set-scenario: Drop errexit option

    Commands may exit with non-zero exit code but this could be normal (for
    example grep does than when it doesn't match anything). As such, lets
    not fail on everything but rather capture such failures and handle them
    appropriately.

    Change-Id: Icc16d0ccd09fd6f262600ae514161bfdf0c593f1
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 1fd4969..7e491c8 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 1fd4969f08389027803eb8b137698751b200737b
+Subproject commit 7e491c8dab6bdc383d86f461a2aea8cf6fd1deb1