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/pxz/default.nix

@@ -0,0 +1,56 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, testers
+, pxz
+, xz
+}:
+
+stdenv.mkDerivation rec {
+  pname = "pxz";
+  version = "4.999.9beta";
+
+  src = fetchFromGitHub {
+    owner = "jnovy";
+    repo = "pxz";
+    rev = "124382a6d0832b13b7c091f72264f8f3f463070a";
+    hash = "sha256-NYhPujm5A0j810IKUZEHru/oLXCW7xZf5FjjKAbatZY=";
+  };
+
+  patches = [ ./flush-stdout-help-version.patch ];
+
+  postPatch = ''
+    substituteInPlace Makefile \
+      --replace '`date +%Y%m%d`' '19700101'
+
+    substituteInPlace pxz.c \
+      --replace 'XZ_BINARY "xz"' 'XZ_BINARY "${lib.getBin xz}/bin/xz"'
+  '';
+
+  buildInputs = [ xz ];
+
+  makeFlags = [
+    "BINDIR=${placeholder "out"}/bin"
+    "MANDIR=${placeholder "out"}/share/man"
+  ];
+
+  passthru.tests.version = testers.testVersion {
+    package = pxz;
+  };
+
+  meta = with lib; {
+    homepage = "https://jnovy.fedorapeople.org/pxz/";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ pashev ];
+    description = "compression utility that runs LZMA compression of different parts on multiple cores simultaneously";
+    longDescription = ''
+      Parallel XZ is a compression utility that takes advantage of
+      running LZMA compression of different parts of an input file on multiple
+      cores and processors simultaneously. Its primary goal is to utilize all
+      resources to speed up compression time with minimal possible influence
+      on compression ratio
+    '';
+    mainProgram = "pxz";
+    platforms = with platforms; linux;
+  };
+}