[xiphos-source] [crosswire/xiphos] 4e9221: Fix #1013 zip help dependency issue

[Dominique Corbex]

  Branch: refs/heads/master
  Home:   https://github.com/crosswire/xiphos
  Commit: 4e92215e4dcdc1e70c9c3d3faaf54888adab531f
      https://github.com/crosswire/xiphos/commit/4e92215e4dcdc1e70c9c3d3faaf54888adab531f
  Author: domcox <16904657+domcorbex at users.noreply.github.com>
  Date:   2020-04-27 (Mon, 27 Apr 2020)

  Changed paths:
    M cmake/XiphosBuildTools.cmake

  Log Message:
  -----------
  Fix #1013 zip help dependency issue