Add libffi6
Before, hledger-aarch64-bin only had libffi6 in optdepends because it's from the AUR. This Merge Request adds libffi6 from the AUR so it can be used as a hard dependency for hledger-aarch64-bin.
Before, hledger-aarch64-bin only had libffi6 in optdepends because it's from the AUR. This Merge Request adds libffi6 from the AUR so it can be used as a hard dependency for hledger-aarch64-bin.