Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 045d5b1454d84d94f321e7e59f4ac3f587119016
  - Switch to lf-build2

    Change-Id: I038b06d7ad15919d75e9fd8274e95d9c5e87181f
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b455a8c..045d5b1 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b455a8c573b0dac07ccef81f044a2302a8342283
+Subproject commit 045d5b1454d84d94f321e7e59f4ac3f587119016