[Vm-dev] [OpenSmalltalk/opensmalltalk-vm] 3a71b3: Use xcode7.3

[GitHub]

  Branch: refs/heads/fniephaus/xcode-update
  Home:   https://github.com/OpenSmalltalk/opensmalltalk-vm
  Commit: 3a71b3e6192ef98505a30dd86ae26f09c46dd579
      https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/3a71b3e6192ef98505a30dd86ae26f09c46dd579
  Author: Fabio Niephaus <code at fniephaus.com>
  Date:   2017-10-22 (Sun, 22 Oct 2017)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Use xcode7.3