[PRQ#64735] Merge Request for multimc5

MarsSeed [1] filed a request to merge multimc5 [2] into multimc-bin [3]: multimc5 is abandoned, outdated. Also upstream's name is now MultiMC, without the '5' suffix. Both packages contain prebuilt binary ELF files of MultiMC, but not its source code. Therefore the '-bin' suffix is necessary. multimc-bin is properly packaged and actively maintained. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/multimc5/ [3] https://aur.archlinux.org/pkgbase/multimc-bin/