Update git submodules

* Update docs/submodules/auto from branch 'master'
  - Merge "Local Documentation Builds"
  - Local Documentation Builds

        This adds configuration for performing local documentation builds
        with the following simple command:

        tox -e docs

    Change-Id: If45ac852cc740b4c6aff3ac6eb29d122905ba194
    Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/auto b/docs/submodules/auto
index 31e65ed..7c6ea04 160000 (submodule)
--- a/docs/submodules/auto
+++ b/docs/submodules/auto
@@ -1 +1 @@
-Subproject commit 31e65eda6ec90afdb81f8276780625cd2f1779c4
+Subproject commit 7c6ea0480fd92e648e8bf5e15ee70370ec5332c3