Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Nomination of David Blaisonneau as XCI committer

    David Blaisonneau is the main driver of introducing native
    support for Pharos PDF/IDF in XCI. He has been also working
    on stabilizing XCI framework and enabling baremetal deployments.

    His contributions include
    - creation of PDFs for baremetal PODs
    - starting the work on improving the stabilization of the framework
    - starting the work on introducing support for PDF/IDF
    - deployment on baremetal

    Change-Id: If4e71c7456e5e8f642b3e82b8ef356747431ed96
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index f114fdb..d729e58 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit f114fdb79f89352ca5268bf04e9e6cb8fb85aeb6
+Subproject commit d729e58ed182923414456569ba68aa4868fed885