Update git submodules

* Update docs/submodules/releng from branch 'master'
  to d3e05cf395d4a65b5684574669ea8d8b3be037a9
  - Stop installing old py versions.

    Change-Id: I8320d8d4ed8b0632020f30bbb5e40d2cd6c26aeb
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 0618bc8..d3e05cf 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 0618bc81c0489815e5ed44a9bec226727e83b911
+Subproject commit d3e05cf395d4a65b5684574669ea8d8b3be037a9