[conformal/btcwallet] c9ee57: Correct walletdb README.md example link.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcwallet
  Commit: c9ee57d53d2cafda22fe57b3256b1ae2ae3129cb
      
https://github.com/conformal/btcwallet/commit/c9ee57d53d2cafda22fe57b3256b1ae2ae3129cb
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-11-10 (Mon, 10 Nov 2014)

  Changed paths:
    M walletdb/README.md

  Log Message:
  -----------
  Correct walletdb README.md example link.