Add Pybombs support. Add SoapySDR support

[bkerler]

This fixes compile issues with gnuradio/pybombs and adds support for SoapySDR. Tested with SoapyUHD and UsrpB210, best setting is with:

ice9-bluetooth -C 32 -l -s -v -i soapy-0 -w out.pcap

[mikeryan]

Thank you for this (and the other) PR! When SoapySDR is unavailable will this code fail or quietly allow the build to continue without the requirement? It's important to me that the number of hard dependencies for this codebase is as small as possible. I welcome SoapySDR support as long as it's not a hard requirement.

[bkerler]

Hi, as SoapySDR is supported by almost all sdr vendors and maintained by the gnuradio team it's unlikely to become obsolete. And if, removing the support is pretty easy. (The changes for SoapySDR are primarily in soapysdr.c and soapysdr.h). If you want any specific changes, just let me know ;)