xorriso: 1.4.6 -> 1.4.8

See http://lists.gnu.org/archive/html/info-gnu/2017-09/msg00009.html
for release information

(cherry picked from commit 259d61b34a358c893638b9c15e7aad74c39bf011)

pkgs/tools/cd-dvd/xorriso/default.nix

···
 { fetchurl, stdenv, libcdio, zlib, bzip2, readline, acl, attr }:
 
 stdenv.mkDerivation rec {
-  name = "xorriso-1.4.6";
+  name = "xorriso-1.4.8";
 
   src = fetchurl {
     url = "mirror://gnu/xorriso/${name}.tar.gz";
-    sha256 = "112p0ghwzxrcjbsir1n2jxhq103ckrw93wzvd55qqvzfgs674vsj";
+    sha256 = "10c44yr3dpmwxa7rf23mwfsy1bahny3jpcg9ig0xjv090jg0d0pc";
   };
 
   doCheck = true;