makemkv: using two URLs for src

This will prevent future failures due to the first URL being broken each
time a new version is released

See https://github.com/NixOS/nixpkgs/pull/50437#issuecomment-439329862
for details

pkgs/applications/video/makemkv/default.nix

@@ -7,13 +7,20 @@ stdenv.mkDerivation rec {
   ver = "1.14.1";
   builder = ./builder.sh;
 
+  # Using two URLs as the first one will break as soon as a new version is released
   src_bin = fetchurl {
-    url = "http://www.makemkv.com/download/makemkv-bin-${ver}.tar.gz";
+    urls = [
+      "http://www.makemkv.com/download/makemkv-bin-${ver}.tar.gz"
+      "http://www.makemkv.com/download/old/makemkv-bin-${ver}.tar.gz"
+    ];
     sha256 = "1n4gjb1531gkvnjzipw63v3zdxmrq5nai9nn6m2ix3lskksjrrhp";
   };
 
   src_oss = fetchurl {
-    url = "http://www.makemkv.com/download/makemkv-oss-${ver}.tar.gz";
+    urls = [
+      "http://www.makemkv.com/download/makemkv-oss-${ver}.tar.gz"
+      "http://www.makemkv.com/download/old/makemkv-oss-${ver}.tar.gz"
+    ];
     sha256 = "0ysb0nm11vp2ni838p5q3gqan5nrqbr7rz0h24j8p62827pib3pw";
   };