Update git submodules

* Update docs/submodules/releng from branch 'master'
  - xci: Run functest as part of xci-merge jobs

    This is yet another messy work to get functest run for xci
    as part of merge jobs.

    The script is removed from xci-verify jobs in order not to
    block patches by -1ing them.

    Change-Id: I57254bcfbada7a51da89aba0e7a88f907eb9a525
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index fcf7d31..5f73ab5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit fcf7d31301c5535b82ebe02b7bd1a6fb68468256
+Subproject commit 5f73ab5e7935451dba7fc27c9026136cdd835605