Fix license version for GtkFileChooserWidget private header
Fix license version for GtkFileChooserWidget private header

Since it's using Lesser GPL, use version 2.1; there is no Lesser GPL v2,
as it was called 'Library GPL' prior to v2.1.

grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita