[phobos] [D-Programming-Language/installer] 2fada5: skip building installer when docs are skipped

[GitHub via phobos]

  Branch: refs/heads/2.067
  Home:   https://github.com/D-Programming-Language/installer
  Commit: 2fada5341d8cadb3c64eb3713ccb66451d2fcd78
      https://github.com/D-Programming-Language/installer/commit/2fada5341d8cadb3c64eb3713ccb66451d2fcd78
  Author: Martin Nowak <code at dawg.eu>
  Date:   2015-02-18 (Wed, 18 Feb 2015)

  Changed paths:
    M create_dmd_release/build_all.d

  Log Message:
  -----------
  skip building installer when docs are skipped