[aur-general] Merge request for Greybird

[Edoardo Maria Elidoro]

Hi everyone,
this [1] is a duplicate of this [2] so I'm asking for a merge.

[1] https://aur.archlinux.org/packages/greybird-themes/
[2] https://aur.archlinux.org/packages/xfce-theme-greybird/

Thanks,
Edoardo