Implement `-r` mode for the Mach-O linker. ## What's Changed * wasm - fix debug info & misc by @Luukdegram in https://github.com/kubkon/zld/pull/96 * macho: implement -r mode by @kubkon in https://github.com/kubkon/zld/pull/95 * macho: write data-in-code entries in -r mode by @kubkon in https://github.com/kubkon/zld/pull/99 * macho+test: misc fixes by @kubkon in https://github.com/kubkon/zld/pull/100 **Full Changelog**: https://github.com/kubkon/zld/compare/v0.0.3...v0.0.4