hackrf: fix udev rule detection impurity

pkgs/applications/misc/hackrf/default.nix

···
     cmake pkgconfig libusb fftwSinglePrec
   ];
 
+  cmakeFlags = [ "-DUDEV_RULES_GROUP=plugdev" "-DUDEV_RULES_PATH=lib/udev/rules.d" ];
+
   preConfigure = ''
     cd host
   '';