Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Wrap Functest Ascii Diagram in literal text block

    Sphinx currently thinks this diagram is a table and outputing a warning.
    Using '::' provides a hint to sphinx that the ascii diagram is literal
    text and not a table.

    Change-Id: Ie005cc059b9e97aacda0d75d0213b18477e55d38
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 39f856f..3a48b78 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 39f856fd8304cdb056beb61d85c81a0613230e40
+Subproject commit 3a48b7845119c374f3be44cdf829f480821759cd