Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "xci: Remove prototypes directory due to migration to releng-xci repo"
  - xci: Remove prototypes directory due to migration to releng-xci repo

    Change-Id: I3b8a1dff64151dc55f05e621bab61f2b214bfd05
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 6b7293d..824ebda 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 6b7293d1c19c084071bfd9d4af16a7b7fdc15930
+Subproject commit 824ebdacf05ffba94a280c2db655e034ed567106