fixup! fs: improve error perf of sync chmod+fchmod

Author: CanadaHonk

benchmark/fs/bench-fchmodSync.js

@@ -32,11 +32,11 @@ function main({ n, type }) {
   }
 
   const fds = files.map((x) => {
-    // Try to open, if not return invalid fd (-1)
+    // Try to open, if not return likely invalid fd (1 << 30)
     try {
       return fs.openSync(x, 'r');
     } catch {
-      return -1;
+      return 1 << 30;
     }
   });