Publish doc for mediawiki/tools/{releng,scap}

Doc is generated using 'tox -e doc' and published on respectively:

https://doc.wikimedia.org/mw-tools-scap/docs/_build/html/
https://doc.wikimedia.org/mw-tools-releng/html/

Will get nicer URL later on.

Change-Id: I7689f8521b60f9bb3153b0d8eb2d02168e75a74d