[GTK][WPE] `generate-bundle` is broken after 269647@main

• Component: Tools / Tests
• Status: RESOLVED FIXED

[Vitaly Dyackhov]

```
vitaly@wkdev:~/Projects/WebKit$ Tools/Scripts/generate-bundle --platform gtk --bundle MiniBrowser --release
Traceback (most recent call last):
  File "/home/vitaly/Projects/WebKit/Tools/Scripts/generate-bundle", line 920, in <module>
    sys.exit(main())
             ^^^^^^
  File "/home/vitaly/Projects/WebKit/Tools/Scripts/generate-bundle", line 915, in main
    bundle_file_path = bundle_creator.create()
                       ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/vitaly/Projects/WebKit/Tools/Scripts/generate-bundle", line 329, in create
    self._tmpdir = self._create_tempdir(self._buildpath)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/vitaly/Projects/WebKit/Tools/Scripts/generate-bundle", line 207, in _create_tempdir
    raise ValueError('%s is not a directory' % basedir)
ValueError: /home/vitaly/Projects/WebKit/WebKitBuild/Release is not a directory
```

[Vitaly Dyackhov]

Pull request: https://github.com/WebKit/WebKit/pull/19705

[EWS]

Committed 269938@main (fee5c9a1355a): <https://commits.webkit.org/269938@main>

Reviewed commits have been landed. Closing PR #19705 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/117683366>