[btcsuite/btcwallet] fda2e1: Change datadir short option to -b.

[Josh Rickmar]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcwallet
  Commit: fda2e14b99bba7e8ff4cf0f7434e1f5e8b130205
      
https://github.com/btcsuite/btcwallet/commit/fda2e14b99bba7e8ff4cf0f7434e1f5e8b130205
  Author: Josh Rickmar <jr...@companyzero.com>
  Date:   2016-02-01 (Mon, 01 Feb 2016)

  Changed paths:
    M config.go

  Log Message:
  -----------
  Change datadir short option to -b.

Fixes #339.