Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 1fe7c7d142ec85f96cbbe4c42021cfef9ecb7c58
  - Debug 2

    Change-Id: Ic8d134d8037c79bfe984155720a4a1c0d64df87d
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 633e16b..1fe7c7d 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 633e16b8e0c922af7bc277bd94c4c4155f89fbb8
+Subproject commit 1fe7c7d142ec85f96cbbe4c42021cfef9ecb7c58