[btcsuite/btcutil] 56fe08: Update Go versions for Travis.

[Josh Rickmar]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcutil
  Commit: 56fe089f4e7fcecae28d1563f25aaf879900ca22
      
https://github.com/btcsuite/btcutil/commit/56fe089f4e7fcecae28d1563f25aaf879900ca22
  Author: Josh Rickmar <jr...@conformal.com>
  Date:   2015-02-05 (Thu, 05 Feb 2015)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Update Go versions for Travis.