Propagate err.stdout and err.stderr from localfs.execFile()

node_modules/vfs-socket/worker.js

@@ -429,6 +429,8 @@ function Worker(vfs) {
             };
             if (err.hasOwnProperty("code")) nerr.code = err.code;
             if (err.hasOwnProperty("message")) nerr.message = err.message;
+            if (err.hasOwnProperty("stdout")) nerr.stdout = err.stdout;
+            if (err.hasOwnProperty("stderr")) nerr.stderr = err.stderr;
             if (!meta)
                 return callback(nerr);
         }