Update git submodules

* Update docs/submodules/availability from branch 'master'
  - Local Documentation Builds
    
        This adds configuration for performing local documentation builds
        with the following simple command:
    
        tox -e docs
    
    added index.rst so that docs build succsesfully
    
    Change-Id: If257dec8d76d3ecf7d75e6cb4771dd9617db7fa4
    Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>
    

1 files changed, 0 insertions, 0 deletions

diff --git a/docs/submodules/availability b/docs/submodules/availability
-Subproject d0c0673873f9cfd1752f25d58b760bb2bf51a93
+Subproject 15a4164a7995aca710d0016ee9e2e1f7a508044