Update git submodules

* Update docs/submodules/releng from branch 'master'
  to efca3e578d8beb32ac45fbb691905aa754cf6bae
  - Typo

    Change-Id: I065fc48245adcdf2755241e928d27205072deb17
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index d304c0a..efca3e5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit d304c0a75d603d5d02e3a9c14d30baaefe980240
+Subproject commit efca3e578d8beb32ac45fbb691905aa754cf6bae