go-counting: Add canonical data file
go-counting: Add canonical data file

Closes https://github.com/exercism/problem-specifications/issues/560

Implementing tracks (4):

* https://github.com/exercism/csharp/tree/master/exercises/go-counting
* https://github.com/exercism/fsharp/tree/master/exercises/go-counting
* https://github.com/exercism/haskell/tree/master/exercises/go-counting
* https://github.com/exercism/python/tree/master/exercises/go-counting

exercism/x-common,petertseng/x-common,jmluy/x-common,jmluy/x-common,rpottsoh/x-common,jmluy/x-common,exercism/x-common,rpottsoh/x-common,ErikSchierboom/x-common,petertseng/x-common,ErikSchierboom/x-common