sphinx warns about autoindex file

[Ruby Loo]

sphinx (v1.1.3) emits warnings about the autoindex file that pbr (0.8.0) generates:

/home/rloo/python-ironicclient/doc/source/api/autoindex.rst:1: WARNING: toctree contains reference to nonexisting document u'api/ :maxdepth: 1'
/home/rloo/python-ironicclient/doc/source/api/autoindex.rst:1: WARNING: toctree contains reference to nonexisting document u'api/ ironicclient.client'

The lines following the toctree directive should be indented relative to the directive start. Instead, the first few lines of the autoindex file look like:

.. toctree::
    :maxdepth: 1

       ironicclient.client.rst
   ironicclient.common.base.rst
   ironicclient.common.http.rst

The lines following the toctree directive should be indented relative to the directive start.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/87428

[Openstack Gerrit (openstack-gerrit)]

Reviewed: https://review.openstack.org/87428
Committed: https://git.openstack.org/cgit/openstack-dev/pbr/commit/?id=e67ff52d845f99121402c6b9185265c989eccfa9
Submitter: Jenkins
Branch: master

commit e67ff52d845f99121402c6b9185265c989eccfa9
Author: Ruby Loo <email address hidden>
Date: Tue Apr 15 02:06:51 2014 +0000

    Format autoindex.rst file properly

    Fix the indentation of the lines following the "toctree" directive
    in the autoindex.rst file, so that they are aligned under the
    start of the "toctree" directive.

    Change-Id: Iff4ec8ea05819f6126a7be3d1fb5238c969fca21
    Closes-Bug: #1307769