replaced several path.* with filepath.* which is platform independent

ethdb/database_test.go

@@ -2,13 +2,14 @@ package ethdb
 
 import (
 	"os"
-	"path"
+
+	"path/filepath"
 
 	"github.com/ethereum/go-ethereum/common"
 )
 
 func newDb() *LDBDatabase {
-	file := path.Join("/", "tmp", "ldbtesttmpfile")
+	file := filepath.Join("/", "tmp", "ldbtesttmpfile")
 	if common.FileExist(file) {
 		os.RemoveAll(file)
 	}