addRcSourceFile

fn addRcSourceFile(s: *Serialize, rsf: *const std.Build.Module.RcSourceFile) !Configuration.RcSourceFile.Index {
    const wc = s.wc;
    const include_paths = try initLazyPathList(s, rsf.include_paths);
    const args = try initStringList(s, rsf.flags);
    return try wc.addExtra(Configuration.RcSourceFile, .{
        .flags = .{
            .args_len = @intCast(args.len),
            .include_paths = include_paths.len != 0,
        },
        .file = try addLazyPath(s, rsf.file),
        .include_paths = .{ .slice = include_paths },
        .args = .{ .slice = args },
    });
}