OX 10.9 Mavericks Fix

Mavericks doesn't like these, because it already includes strlcat and strlcpy somewhere.

This uses the same fix used for [JRuby](https://github.com/jruby/jruby-launcher/pull/6)

Should fix Issue [27](https://code.google.com/p/py-setproctitle/issues/detail?id=27)