findimagedupes: make as separate package

pkgs/top-level/all-packages.nix

···
 
   facedetect = callPackage ../tools/graphics/facedetect { };
 
+  findimagedupes = callPackage ../tools/graphics/findimagedupes { };
+
   facter = callPackage ../tools/system/facter { };
 
   fasd = callPackage ../tools/misc/fasd { };

pkgs/top-level/perl-packages.nix

···
     buildInputs = [ TestPod ];
   };
 
-  findimagedupes = callPackage ../development/perl-modules/findimagedupes { };
-
   FindLib = buildPerlPackage {
     pname = "Find-Lib";
     version = "1.04";