findutils: 4.4.2 -> 4.6.0

The first findutils update in six years! Changes:

https://lists.gnu.org/archive/html/info-gnu/2015-12/msg00014.html

pkgs/tools/misc/findutils/default.nix

@@ -1,16 +1,14 @@
-{stdenv, fetchurl, coreutils}:
+{ stdenv, fetchurl, coreutils }:
 
 stdenv.mkDerivation rec {
-  name = "findutils-4.4.2";
+  name = "findutils-4.6.0";
 
   src = fetchurl {
     url = "mirror://gnu/findutils/${name}.tar.gz";
-    sha256 = "0amn0bbwqvsvvsh6drfwz20ydc2czk374lzw5kksbh6bf78k4ks3";
+    sha256 = "178nn4dl7wbcw499czikirnkniwnx36argdnqgz4ik9i6zvwkm6y";
   };
 
-  nativeBuildInputs = [coreutils];
-
-  patches = [ ./findutils-path.patch ./change_echo_path.patch ./disable-test-canonicalize.patch ];
+  nativeBuildInputs = [ coreutils ];
 
   doCheck = true;
 
@@ -19,9 +17,7 @@ stdenv.mkDerivation rec {
     configureFlags = [ "gl_cv_func_wcwidth_works=yes" ];
   };
 
-  preConfigure = if stdenv.isCygwin then ''
-    sed -i gnulib/lib/fpending.h -e '/include <stdio_ext.h>/d'
-  '' else null;
+  enableParallelBuilding = true;
 
   meta = {
     homepage = http://www.gnu.org/software/findutils/;