fs: consistently return symlink type from readdir

Use 'lstat' to determine type of directory entry.
This is more consistent with the type returned from the readdir binding.
Also use 'path.join' over 'path.resolve' because 'name' is not absolute.

lib/internal/fs/utils.js

@@ -129,7 +129,7 @@ function getDirents(path, [names, types], callback) {
         const name = names[i];
         const idx = i;
         toFinish++;
-        lazyLoadFs().stat(pathModule.resolve(path, name), (err, stats) => {
+        lazyLoadFs().lstat(pathModule.join(path, name), (err, stats) => {
           if (err) {
             callback(err);
             return;
@@ -152,7 +152,7 @@ function getDirents(path, [names, types], callback) {
       const type = types[i];
       if (type === UV_DIRENT_UNKNOWN) {
         const name = names[i];
-        const stats = lazyLoadFs().statSync(pathModule.resolve(path, name));
+        const stats = lazyLoadFs().lstatSync(pathModule.join(path, name));
         names[i] = new DirentFromStats(name, stats);
       } else {
         names[i] = new Dirent(names[i], types[i]);