linuxPackages.nvidia_x11.persistenced: pick up nvidia_x11 makeFlags

pkgs/os-specific/linux/nvidia-x11/persistenced.nix

···
   nativeBuildInputs = [ m4 ];
   buildInputs = [ libtirpc ];
 
+  inherit (nvidia_x11) makeFlags;
+
   installFlags = [ "PREFIX=$(out)" ];
 
   postFixup = ''