[btcsuite/btcd] b6b1e5: TravisCI: Set vendor experiment variable earlier. ...

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: b6b1e55d1ed9244d5618e0d5086a63e6f7fa79fc
      
https://github.com/btcsuite/btcd/commit/b6b1e55d1ed9244d5618e0d5086a63e6f7fa79fc
  Author: Dave Collins <d...@davec.name>
  Date:   2016-08-08 (Mon, 08 Aug 2016)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  TravisCI: Set vendor experiment variable earlier. (#731)

This sets the GO15VENDOREXPERIMENT environment variable before glide is
installed so vendoring is used when installing it as well.