nfs-utils: properly strip system-generators

nfs-utils had a dependency on gcc through
etc/systemd/system-generators/*-server-generator. It was not stripped
correctly because it’s not in an expected path. This adds it to the
strip list.

pkgs/os-specific/linux/nfs-utils/default.nix

@@ -83,6 +83,8 @@ in stdenv.mkDerivation rec {
     "statdpath=$(TMPDIR)"
   ];
 
+  stripDebugList = [ "lib" "libexec" "bin" "etc/systemd/system-generators" ];
+
   postInstall =
     ''
       # Not used on NixOS