build: use new linker if both new-linker and use-llvm are true

build.zig

@@ -223,7 +223,6 @@ pub fn build(b: *std.Build) !void {
 
     const use_llvm = b.option(bool, "use-llvm", "Use the llvm backend");
     exe.use_llvm = use_llvm;
-    exe.use_lld = use_llvm;
 
     if (no_bin) {
         b.getInstallStep().dependOn(&exe.step);