update gnuradio to 3.6.5.1 for the gr-osmosdr gr3.6 branch so everything
works again, gr-baz changed to use cmake
Merge pull request #36 from ksnieck/master

Updates gnuradio to 3.6.5.1 and gr-osmosdr to it's gr3.6 branch so they work together nicely.
added autoconf dependency for XCode > 4.3
hacks to work on osx with clang
Changed dependency from gfortran to gcc

If you try to install gfortran with the latest version of brew you will get this message:

Error: No available formula for gfortran
GNU Fortran is now provided as part of GCC, and can be installed with:
  brew install gcc
Removed duplicate installation of GCC 4.2
Merge branch 'master' of git://github.com/arrtchiu/homebrew-hackrf
Prevent a shallow copy of the RTL-SDR repository. Apparently their server doesn't like shallow copies?
Merging in fix for autoconf dependency in rtlsdr formula.
Prevent gr-osmosdr formula from doing a shallow copy.
Set gr-baz formula to use the 3.6 branch for GNU Radio formula compatibility.
Patch from Michael Dickens fixing compilation issues on OSX 10.9.
Moving libhackrf formula to use the latest code.