ghostscript: CUPS support is no longer enabled by default in version 9.x

We must explicitly give the "--with-install-cups" option at configure time to
get the gstoraster filter installed.

svn path=/nixpkgs/trunk/; revision=31487

pkgs/misc/ghostscript/default.nix

@@ -85,7 +85,9 @@ stdenv.mkDerivation rec {
     makeFlagsArray=(CUPSSERVERBIN=$out/lib/cups CUPSSERVERROOT=$out/etc/cups CUPSDATA=$out/share/cups)
   '';
 
-  configureFlags = if x11Support then [ "--with-x" ] else [ "--without-x" ];
+  configureFlags =
+    (if x11Support then [ "--with-x" ] else [ "--without-x" ]) ++
+    (if cupsSupport then [ "--enable-cups" "--with-install-cups" ] else [ "--disable-cups" ]);
 
   doCheck = true;