Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: xci-deploy: Fix sourcing of inbound scenarios overrides files"
  - xci: xci-deploy: Fix sourcing of inbound scenarios overrides files

    We first need to look for the 'xci_overrides' file in the scenarios
    directory instead of the the XCI_CACHE since for inbound scenarios
    the former contains in-flight changes. The cache only contains whatever
    is committed in git and it may not capture changes which are being made
    to the actual XCI tree.

    Change-Id: Icd64d14d508c89a78823cecf7cc46bd31e50a475
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index b9ce25c..7777163 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit b9ce25cd8076d548f42b0f896577789e502400ad
+Subproject commit 7777163b52f2a440b9e0ee0b6b3972017b911a0f