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

Validated as no change in `out` output with `diffoscope`.

pkgs/development/libraries/motif/default.nix

···
 { lib, stdenv, fetchurl, fetchpatch, pkg-config, libtool
-, xlibsWrapper, xbitmaps, libXrender, libXmu, libXt
+, xbitmaps, libXext, libXft, libXrender, libXmu, libXt
 , expat, libjpeg, libpng, libiconv
 , flex
 , libXp, libXau
···
 
   buildInputs = [
     libtool
-    xlibsWrapper xbitmaps libXrender libXmu libXt
+    xbitmaps libXext libXft libXrender libXmu libXt
     expat libjpeg libpng libiconv
   ];