Log Message:
ham/rtl-sdr: Update to 2.0.0

While this is a vast bump from 0.6.0, it really represents upstream
actually having a release (last one 2018) with years of accumulated
bugfixes and minor enhancements.

  - add IPv6 in rtl_tcp
  - modernize cmake support
  - new program rtl_biast
  - support blog v4 upconverter
  - support direct sampling