Build-gnuradio update

Minor update to build-gnuradio today to insert the correct UDEV
configuration for B100–prior to today, it only had a rule for
USRP1, but with the advent of the B100, it uses different USB ids,
and thus needs its own UDEV rules.


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