Post install script fix (#9524)

Update the override detection logic to make sure the full path exists in
project (not just the module).

Author: laemtl

npm-postinstall.js

@@ -14,7 +14,7 @@ const getPath = (p) => {
 
   if (
     pathParts[0] === 'modules' &&
-    fs.existsSync(path.join(__dirname, 'project', 'modules', pathParts[1]))
+    fs.existsSync(path.join(__dirname, 'project', ...pathParts))
   ) {
     return path.join('project', p);
   }