update recipes for gocode, correct the output file name both in go-auto...

### Correct the recipes for gocode
When installing gocode  from original recipes, it will build an executable which named go-autocomplete(go-autocomplete.exe) or go-company(go-company.exe). But both go-autocomplete.el and go-company.el use the executable which named "gocode", so we must ensure the output file name is gocode or gocode.exe in windows.