Update git submodules

* Update docs/submodules/releng from branch 'master'
  to d57a33ff94d8092438b39bc1a7b60c55424cade9
  - Add Functest CNTT benchmarking testcases

    It doesn't run shaker and vtmp which are equal in IaaS verification and
    CNTT conformance. CNTT benchmarking testcase costs time for quite
    nothing but it verifies both processes (IaaS verification and
    CNTT conformance).

    Change-Id: I793a9ca12fc13a19dd7d672010b4149f3cd82452
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index d255c3c..d57a33f 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit d255c3cf1ce784d611a947063728a600f5f38154
+Subproject commit d57a33ff94d8092438b39bc1a7b60c55424cade9