Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 58954fc37a9db69b87f9efb1f0a0b352340d6b7e
  - xci: Ensure the flavor is captured in all cases

    Change-Id: I48ee615325002a2d3687d336b9a83a0e5637cee7
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 417d91d..58954fc 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 417d91d8d6de7b0887759b5a17a0bafa5aed7cbe
+Subproject commit 58954fc37a9db69b87f9efb1f0a0b352340d6b7e