oneko: use xorg.* packages directly instead of xlibsWrapper indirection

Tested as no material change in `out` output with `diffoscope`.

pkgs/applications/misc/oneko/default.nix

···
-{ lib, stdenv, fetchFromGitHub, imake, gccmakedep, xlibsWrapper }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, imake
+, gccmakedep
+, libX11
+, libXext
+}:
 
 stdenv.mkDerivation rec {
   version_name = "1.2.hanami.6";
···
     sha256 = "0vx12v5fm8ar3f1g6jbpmd3b1q652d32nc67ahkf28djbqjgcbnc";
   };
   nativeBuildInputs = [ imake gccmakedep ];
-  buildInputs = [ xlibsWrapper ];
+  buildInputs = [ libX11 libXext ];
 
   makeFlags = [ "BINDIR=$(out)/bin" "MANPATH=$(out)/share/man" ];
   installTargets = [ "install" "install.man" ];