src: fix bootstrap_node on bsd

Currently makes a call to `realpathSync.native` which doesn't exist
on 8.x or lower

PR-URL: #22663
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Myles Borins <myles.borins@gmail.com>

lib/internal/bootstrap_node.js

@@ -88,7 +88,7 @@
     // get the full path before process.execPath is used.
     if (process.platform === 'openbsd') {
       const { realpathSync } = NativeModule.require('fs');
-      process.execPath = realpathSync.native(process.execPath);
+      process.execPath = realpathSync(process.execPath);
     }
 
     Object.defineProperty(process, 'argv0', {