gparted: add procps dependency

The 'gparted' wrapper script uses 'ps' as a poor person's lock.
Make sure that this doesn't silently fail.

pkgs/tools/misc/gparted/default.nix

@@ -1,6 +1,6 @@
 { stdenv, fetchurl, intltool, gettext, makeWrapper
 , parted, gtk, glib, libuuid, pkgconfig, gtkmm, libxml2, hicolor_icon_theme
-, gpart, hdparm, utillinux
+, gpart, hdparm, procps, utillinux
 }:
 
 stdenv.mkDerivation rec {
@@ -17,6 +17,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ intltool gettext makeWrapper pkgconfig ];
 
   postInstall = ''
+    wrapProgram $out/sbin/gparted \
+      --prefix PATH : "${procps}/bin"
     wrapProgram $out/sbin/gpartedbin \
       --prefix PATH : "${gpart}/bin:${hdparm}/bin:${utillinux}/bin"
   '';