BLLIP on Mavericks

These aren't changes that I think should be merged in this form, but since some folks are having trouble with Mac OS X Mavericks I wanted to share the tweaks that work for me (both 10.9.2 and 10.8.5).  

I got help from these pages:

http://trac.macports.org/wiki/UsingTheRightCompiler
http://ladstatt.blogspot.com/2013/04/upgrading-gcc-to-gcc48-on-macosx.html