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/tools/compression/pigz/default.nix

@@ -0,0 +1,37 @@
+{ lib, stdenv, fetchFromGitHub, zlib, util-linux }:
+
+stdenv.mkDerivation rec {
+  pname = "pigz";
+  version = "2.6";
+
+  src = fetchFromGitHub {
+      owner = "madler";
+      repo = "${pname}";
+      rev = "refs/tags/v${version}";
+      sha256 = "146qkmzi199xwmmf6bllanqfyl702fm1rnad8cd5r5yyrp5ks115";
+  };
+
+  enableParallelBuilding = true;
+
+  buildInputs = [ zlib ] ++ lib.optional stdenv.isLinux util-linux;
+
+  makeFlags = [ "CC=${stdenv.cc}/bin/${stdenv.cc.targetPrefix}cc" ];
+
+  doCheck = stdenv.isLinux;
+  checkTarget = "tests";
+  installPhase = ''
+    install -Dm755 pigz "$out/bin/pigz"
+    ln -s pigz "$out/bin/unpigz"
+    install -Dm755 pigz.1 "$out/share/man/man1/pigz.1"
+    ln -s pigz.1 "$out/share/man/man1/unpigz.1"
+    install -Dm755 pigz.pdf "$out/share/doc/pigz/pigz.pdf"
+  '';
+
+  meta = with lib; {
+    homepage = "https://www.zlib.net/pigz/";
+    description = "A parallel implementation of gzip for multi-core machines";
+    maintainers = with maintainers; [ ];
+    license = licenses.zlib;
+    platforms = platforms.unix;
+  };
+}