[conformal/btcwire] 63cc08: Add benchmarks for writeTxIn.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcwire
  Commit: 63cc0851e5bee7fe6152ace2c46fd796b1b08ca6
      
https://github.com/conformal/btcwire/commit/63cc0851e5bee7fe6152ace2c46fd796b1b08ca6
  Author: Dave Collins <da...@conformal.com>
  Date:   2013-11-06 (Wed, 06 Nov 2013)

  Changed paths:
    M bench_test.go
    M internal_test.go

  Log Message:
  -----------
  Add benchmarks for writeTxIn.

This commit adds a benchmark for the writeTxIn function.