use gr_profiler tool to get sys and version info.
gr_profiler: add use of sysctl on OS X to get most of /proc/cpuinfo data.
updates benchmarking script to use kwargs for passing extra args (defined in the json) to the benchmarking test scripts.

Fixes up the json test scripts; adds a new test for FIR filters.
fixing handling of multiple tests in benchmarking and plotting. Updated json test for fir filters.
Merge remote-tracking branch 'tom/master'
getout syntax fix
make sure controlport exports are on before running benchmarks