[Checkins] [zopefoundation/ZODB] 8ecd96: Simplify making the docs on travis with make -C

[GitHub]

  Branch: refs/heads/python36
  Home:   https://github.com/zopefoundation/ZODB
  Commit: 8ecd9634d841febb4c07ae42a62485b23085cdd1
      https://github.com/zopefoundation/ZODB/commit/8ecd9634d841febb4c07ae42a62485b23085cdd1
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2017-07-24 (Mon, 24 Jul 2017)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Simplify making the docs on travis with make -C

[skip appveyor]