Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Add build_sphinx section in setup.cfg

    Change-Id: Ieac48a1a213bc5cd62a42dab1c74c80761e82fd1
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 5da3abf..f424ff1 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 5da3abf280d41e145da4e52b95836359f380875a
+Subproject commit f424ff12f6bdb7ef87f3982b7eb058716050457b