bug#68483: Qutebrowser QT platform plugin could not be initialized

[chris <chris@bumblehead.com>]

On  1月15日 月, chris wrote:
> On  1月16日 火, Sergey Trofimov wrote:
> > 
> > Here you go:
> > ```sh
> > qtw=$(guix build qtwayland@6)/lib/qt6/plugins
> > QT_PLUGIN_PATH=$qtw QT_QPA_PLATFORM_PLUGIN_PATH=$qtw/platforms qutebrowser -s qt.force_platform wayland
> > ```
> >

I think it needed the extra slash after at the end of $qtw... the shell output looks problematic, but otherwise the browser has started. Thank you

```
$ qtw=$(guix build qtwayland@6)/lib/qt6/plugins; QT_PLUGIN_PATH=$qtw/; QT_QPA_PLATFORM_PLUGIN_PATH=$qtw/platforms; qutebrowser -s qt.force_platform wayland
23:47:07 ERROR: Failed to copy webengine resources, not applying quirk
Traceback (most recent call last):
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/misc/pakjoy.py", line 253, in patch_webengine
    webengine_resources_path = copy_webengine_resources()
  File "/gnu/store/xc2z9q7z036ny3fipgqvwc01yn20j2jh-qutebrowser-3.1.0/lib/python3.10/site-packages/qutebrowser/misc/pakjoy.py", line 197, in copy_webengine_resources
    shutil.rmtree(work_dir)
  File "/gnu/store/3lxr2xg3yscdb3979blgjg0h7xd1n9la-python-3.10.7/lib/python3.10/shutil.py", line 724, in rmtree
    _rmtree_safe_fd(fd, path, onerror)
  File "/gnu/store/3lxr2xg3yscdb3979blgjg0h7xd1n9la-python-3.10.7/lib/python3.10/shutil.py", line 680, in _rmtree_safe_fd
    onerror(os.unlink, fullname, sys.exc_info())
  File "/gnu/store/3lxr2xg3yscdb3979blgjg0h7xd1n9la-python-3.10.7/lib/python3.10/shutil.py", line 678, in _rmtree_safe_fd
    os.unlink(entry.name, dir_fd=topfd)
PermissionError: [Errno 13] 許可がありません: 'qtwebengine_devtools_resources.pak'
23:47:08 INFO: Showing changelog after upgrade to qutebrowser v3.1.0.
```