bibclean: add platforms

pkgs/tools/typesetting/bibclean/default.nix

@@ -21,6 +21,7 @@ stdenv.mkDerivation rec {
     description = "Prettyprint and syntax check BibTeX and Scribe bibliography data base files";
     homepage = "http://ftp.math.utah.edu/pub/bibclean";
     license = licenses.gpl2;
+    platforms = platforms.all;
     maintainers = with maintainers; [ dtzWill ];
   };
 }