[xiphos-source] [crosswire/xiphos] c33547: Don't double-install on Arch

[Greg Hellings]

  Branch: refs/heads/master
  Home:   https://github.com/crosswire/xiphos
  Commit: c33547e5545ec2d8a9b2c5275aec5f6c24d0908d
      https://github.com/crosswire/xiphos/commit/c33547e5545ec2d8a9b2c5275aec5f6c24d0908d
  Author: Gregory Hellings <greg.hellings at gmail.com>
  Date:   2020-03-17 (Tue, 17 Mar 2020)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Don't double-install on Arch