Teach 'make rpm' to work on EL5 based systems

Assuming python26 and friends are installed, teach the makefile to spit out an RPM. This set of changes has been tested on SL5 and SL6 it spits out an rpm and seems to do the right thing the systems we have here. I would suggest someone test this before pulling, especially as I do not use the fireball mode. Please test!

Also, this depends on #2361 I thought it might be better to have two separate PR's as you might not want the packaging changes.