pcb: use xorg.* packages directly instead of xlibsWrapper

As recommended by https://github.com/NixOS/nixpkgs/issues/194054

Built outputs (`x86-linux`) are identical except for the `pcb` binary, which was
manually reviewed with `vbindiff` to confirm that the only differences were
self-$out path references.

+5 -2
+5 -2
pkgs/applications/science/electronics/pcb/default.nix
··· 8 8 , netpbm 9 9 , imagemagick 10 10 , dbus 11 - , xlibsWrapper 11 + , freetype 12 + , fontconfig 12 13 , libGLU 13 14 , libGL 14 15 , shared-mime-info ··· 40 41 buildInputs = [ 41 42 gtk2 42 43 dbus 43 - xlibsWrapper 44 + xorg.libXrender 45 + freetype 46 + fontconfig 44 47 libGLU 45 48 libGL 46 49 tcl