[parrot/parrot] 8a1265: [ci] Add zlib

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/parrot/parrot
  Commit: 8a1265a34f90bfcae4ab3e363d68b9213778114b
      https://github.com/parrot/parrot/commit/8a1265a34f90bfcae4ab3e363d68b9213778114b
  Author: Jonathan "Duke" Leto <jonathan at leto.net>
  Date:   2012-01-29 (Sun, 29 Jan 2012)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  [ci] Add zlib