uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/libraries/udns/default.nix

@@ -0,0 +1,46 @@
+{ lib, stdenv, fetchurl }:
+
+# this expression is mostly based on debian's packaging
+# https://tracker.debian.org/media/packages/u/udns/rules-0.4-1
+
+stdenv.mkDerivation rec {
+  pname = "udns";
+  version = "0.4";
+
+  configurePhase = "./configure --enable-ipv6";
+
+  buildPhase = "make staticlib sharedlib rblcheck_s dnsget_s";
+
+  src = fetchurl {
+    url = "http://www.corpit.ru/mjt/udns/${pname}-${version}.tar.gz";
+    sha256 = "0447fv1hmb44nnchdn6p5pd9b44x8p5jn0ahw6crwbqsg7f0hl8i";
+  };
+
+  installPhase = ''
+    mkdir -p $out/bin
+    mkdir -p $out/include
+    mkdir -p $out/lib
+    mkdir -p $out/share/man/man1
+    mkdir -p $out/share/man/man3
+    cp dnsget_s $out/bin/dnsget
+    cp rblcheck_s $out/bin/rblcheck
+    cp udns.h $out/include/
+    cp libudns.a $out/lib/
+    cp libudns.so.0 $out/lib/
+    ln -rs $out/lib/libudns.so.0 $out/lib/libudns.so
+    cp dnsget.1 rblcheck.1 $out/share/man/man1
+    cp udns.3 $out/share/man/man3
+  '';
+
+  # keep man3
+  outputDevdoc = "out";
+
+  meta = with lib; {
+    homepage = "http://www.corpit.ru/mjt/udns.html";
+    description = "Async-capable DNS stub resolver library";
+    license = licenses.lgpl21Plus;
+    maintainers = [ maintainers.womfoo ];
+    platforms = platforms.linux;
+  };
+
+}