Display supported ABI(s) for every apk on website

Apps that have native dependencies could release multiple apks for various ABIs at an update. Without an F-Droid client installed, It would be hard for website users to download the right apk works for their devices. As for the case of Seal, version 10604 (x86_64) was flagged as the recommended version on the website but it's incompatible with most Android phones.