Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 58d4e8ac35875c27a538a3a26e95c8ec2d041793
  - Merge "Select master as default branch"
  - Select master as default branch

    Change-Id: I7aebaf0df0ed7d6f4c502297e14db7e750c6247f
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a0e12de..58d4e8a 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a0e12de944ccee3e889274a35e204dc93098c53f
+Subproject commit 58d4e8ac35875c27a538a3a26e95c8ec2d041793