[btcsuite/btcutil] 5dada8: Update fastsha256 import paths to new location.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcutil
  Commit: 5dada8b18499fca4855f8361fbd78f493dc0aebf
      
https://github.com/btcsuite/btcutil/commit/5dada8b18499fca4855f8361fbd78f493dc0aebf
  Author: Dave Collins <da...@conformal.com>
  Date:   2015-01-16 (Fri, 16 Jan 2015)

  Changed paths:
    M coinset/coins_test.go
    M hash160.go

  Log Message:
  -----------
  Update fastsha256 import paths to new location.