[drlvm] upgrade apr, apr-util to 1.2.12

[Nathan Beyer]

Is there any specific reason we're still on apr/apr-util 1.2.6?

I'm trying to get things running on Leopard and it seems 1.2.12 is
necessity. How do we want to approach such an upgrade?

I noticed that the apr-iconv is also a bit out of date.

-Nathan