linuxPackages.extfat-nofuse: fix libelf dependency

pkgs/os-specific/linux/exfat/default.nix

···
 
   hardeningDisable = [ "pic" ];
 
+  nativeBuildInputs = kernel.moduleBuildDependencies;
+
   makeFlags = [
     "KDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
   ];