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/pixz/default.nix

@@ -0,0 +1,51 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, autoconf
+, automake
+, libtool
+, pkg-config
+, asciidoc
+, libxslt
+, libxml2
+, docbook_xml_dtd_45
+, docbook_xsl
+, libarchive
+, xz
+}:
+
+stdenv.mkDerivation rec {
+  pname = "pixz";
+  version = "1.0.7";
+
+  nativeBuildInputs = [ pkg-config autoconf automake ];
+  buildInputs = [
+    libtool
+    asciidoc
+    libxslt
+    libxml2
+    docbook_xml_dtd_45
+    docbook_xsl
+    libarchive
+    xz
+  ];
+  preBuild = ''
+    echo "XML_CATALOG_FILES='$XML_CATALOG_FILES'"
+  '';
+  src = fetchFromGitHub {
+    owner = "vasi";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "163axxs22w7pghr786hda22mnlpvmi50hzhfr9axwyyjl9n41qs2";
+  };
+  preConfigure = ''
+    ./autogen.sh
+  '';
+
+  meta = with lib; {
+    description = "A parallel compressor/decompressor for xz format";
+    license = licenses.bsd2;
+    maintainers = [ maintainers.raskin ];
+    platforms = platforms.unix;
+  };
+}