DragonOS-Community/printf-compat: printf impl in Rust

réplica de https://github.com/DragonOS-Community/printf-compat

JC 194a832ab6 Add minimal executable to ensure lib is no-std and no-alloc		%!s(int64=2) %!d(string=hai) anos
..
ensure_no_std	194a832ab6 Add minimal executable to ensure lib is no-std and no-alloc	hai 1 mes