New build-gnuradio

I’ve updated build-gnuradio to use a somewhat different approach to
fetching firmware/fpga images
from the newly-shuffled website where they’re now kept. I’m sure I’ll
need to do it again.

http://www.sbrac.org/files/build-gnuradio


Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org