[aur-general] Merge request: Greenbird

Hi TUs! I've adopted this theme [1] but PKGBUILD refer to git... so... please merge [1] in [2] Thanks in advance Diego [1] - https://aur.archlinux.org/packages/xfce-theme-greenbird [2] - https://aur.archlinux.org/packages/xfce-theme-greenbird-git