Fix `make check`
Fix `make check`

It was not correctly excluding files for os.Getenv, for example
it would complain about `os.Getenv` in `acceptance/util_test.go`
which should be excluded.

cockroachdb/cockroach,maxlang/cockroach,paperstreet/cockroach,arjun4084346/cockroach,paperstreet/cockroach,arjun4084346/cockroach,glycerine/cockroach,vivekmenezes/cockroach,glycerine/cockroach,vivekmenezes/cockroach,sunya123/cockroach,petermattis/cockroach,maxlang/cockroach,sunya123/cockroach,sunya123/cockroach,vivekmenezes/cockroach,cockroachdb/cockroach,cockroachdb/cockroach,glycerine/cockroach,vaibhavarora/cockroach,arjun4084346/cockroach,veteranlu/cockroach,paperstreet/cockroach,arjun4084346/cockroach,petermattis/cockroach,sunya123/cockroach,veteranlu/cockroach,maxlang/cockroach,maxlang/cockroach,maxlang/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,petermattis/cockroach,glycerine/cockroach,veteranlu/cockroach,sunya123/cockroach,sunya123/cockroach,arjun4084346/cockroach,glycerine/cockroach,vaibhavarora/cockroach,cockroachdb/cockroach,vivekmenezes/cockroach,sunya123/cockroach,petermattis/cockroach,petermattis/cockroach,maxlang/cockroach,vivekmenezes/cockroach,vaibhavarora/cockroach,petermattis/cockroach,petermattis/cockroach,glycerine/cockroach,maxlang/cockroach,vaibhavarora/cockroach,arjun4084346/cockroach,veteranlu/cockroach,vivekmenezes/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,arjun4084346/cockroach,paperstreet/cockroach,sunya123/cockroach,cockroachdb/cockroach,paperstreet/cockroach,paperstreet/cockroach,glycerine/cockroach,vivekmenezes/cockroach,paperstreet/cockroach,glycerine/cockroach,veteranlu/cockroach,cockroachdb/cockroach,paperstreet/cockroach,arjun4084346/cockroach,maxlang/cockroach,vaibhavarora/cockroach,veteranlu/cockroach,veteranlu/cockroach,cockroachdb/cockroach,vivekmenezes/cockroach,petermattis/cockroach,cockroachdb/cockroach