Work around broken Lstat on Android

internal/versioner/external.go

@@ -12,6 +12,8 @@ import (
 	"os/exec"
 	"path/filepath"
 	"strings"
+
+	"github.com/syncthing/syncthing/internal/osutil"
 )
 
 func init() {
@@ -43,7 +45,7 @@ func NewExternal(folderID, folderPath string, params map[string]string) Versione
 // Move away the named file to a version archive. If this function returns
 // nil, the named file does not exist any more (has been archived).
 func (v External) Archive(filePath string) error {
-	_, err := os.Lstat(filePath)
+	_, err := osutil.Lstat(filePath)
 	if os.IsNotExist(err) {
 		if debug {
 			l.Debugln("not archiving nonexistent file", filePath)
@@ -82,7 +84,7 @@ func (v External) Archive(filePath string) error {
 	}
 
 	// return error if the file was not removed
-	if _, err = os.Lstat(filePath); os.IsNotExist(err) {
+	if _, err = osutil.Lstat(filePath); os.IsNotExist(err) {
 		return nil
 	}
 	return errors.New("Versioner: file was not removed by external script")