Merge pull request #8621 from deepfire/master

libev: make the url stable

pkgs/development/libraries/libev/default.nix

···
   name = "libev-${version}";
   version="4.19";
   src = fetchurl {
-    url = "http://dist.schmorp.de/libev/${name}.tar.gz";
+    url = "http://dist.schmorp.de/libev/Attic/${name}.tar.gz";
     sha256 = "1jyw7qbl0spxqa0dccj9x1jsw7cj7szff43cq4acmklnra4mzz48";
   };