Update goleveldb dependency

vendor/github.com/syndtr/goleveldb/manualtest/filelock/main.go

@@ -0,0 +1,85 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"flag"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+
+	"github.com/syndtr/goleveldb/leveldb/storage"
+)
+
+var (
+	filename string
+	child    bool
+)
+
+func init() {
+	flag.StringVar(&filename, "filename", filepath.Join(os.TempDir(), "goleveldb_filelock_test"), "Filename used for testing")
+	flag.BoolVar(&child, "child", false, "This is the child")
+}
+
+func runChild() error {
+	var args []string
+	args = append(args, os.Args[1:]...)
+	args = append(args, "-child")
+	cmd := exec.Command(os.Args[0], args...)
+	var out bytes.Buffer
+	cmd.Stdout = &out
+	err := cmd.Run()
+	r := bufio.NewReader(&out)
+	for {
+		line, _, e1 := r.ReadLine()
+		if e1 != nil {
+			break
+		}
+		fmt.Println("[Child]", string(line))
+	}
+	return err
+}
+
+func main() {
+	flag.Parse()
+
+	fmt.Printf("Using path: %s\n", filename)
+	if child {
+		fmt.Println("Child flag set.")
+	}
+
+	stor, err := storage.OpenFile(filename, false)
+	if err != nil {
+		fmt.Printf("Could not open storage: %s", err)
+		os.Exit(10)
+	}
+
+	if !child {
+		fmt.Println("Executing child -- first test (expecting error)")
+		err := runChild()
+		if err == nil {
+			fmt.Println("Expecting error from child")
+		} else if err.Error() != "exit status 10" {
+			fmt.Println("Got unexpected error from child:", err)
+		} else {
+			fmt.Printf("Got error from child: %s (expected)\n", err)
+		}
+	}
+
+	err = stor.Close()
+	if err != nil {
+		fmt.Printf("Error when closing storage: %s", err)
+		os.Exit(11)
+	}
+
+	if !child {
+		fmt.Println("Executing child -- second test")
+		err := runChild()
+		if err != nil {
+			fmt.Println("Got unexpected error from child:", err)
+		}
+	}
+
+	os.RemoveAll(filename)
+}