Named consistently after "wallpaper_community" and "wallpaper_unsplash".
The recipe produces two packages with the sound files of the Community
System Sounds Contest of 2020 [1]:
sounds_community_default: the winning theme "Burg's Sparkly Tones"
sounds_community: the 16 themes of the other contestants
[1] https://www.haiku-os.org/news/2020-09-11-system-sound-contest/
