[Kst-plot/kst] b7387a: The ppa for Ubuntu 14.04 is still kde4...

[Barth Netterfield]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: b7387ab18101ec92ae64db4e4672cd46a5cfcfe5
      https://github.com/Kst-plot/kst/commit/b7387ab18101ec92ae64db4e4672cd46a5cfcfe5
  Author: Barth Netterfield <netterfield at astro.utoronto.ca>
  Date:   2018-03-27 (Tue, 27 Mar 2018)

  Changed paths:
    A docbook/kst/index.kde4build.docbook

  Log Message:
  -----------
  The ppa for Ubuntu 14.04 is still kde4...

so use the old dtd for that build.