www.stockfishchess.org or from my repository using below links.
It's unknown to me who prepared these two builds but one thing remains to remember: Aprijal's builds are running significantly faster than the official ones.
Additional info: Shortly after publishing this post, it's been confirmed that official builds are taken from Droidfish 1.63. Now we know Peter Österlund compiled these.
GET Stockfish 8.0 official for 32-bit arm7 pie
GET Stockfish 8.0 official for 64-bit arm8