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/dxflib/default.nix

@@ -0,0 +1,46 @@
+{ lib, stdenv
+, fetchurl
+, qmake
+}:
+
+stdenv.mkDerivation rec {
+  version = "3.26.4";
+  pname = "dxflib";
+  src = fetchurl {
+    url = "https://qcad.org/archives/dxflib/${pname}-${version}-src.tar.gz";
+    sha256 = "0pwic33mj6bp4axai5jiyn4xqf31y0xmb1i0pcf55b2h9fav8zah";
+  };
+  nativeBuildInputs = [
+    qmake
+  ];
+  dontWrapQtApps = true;
+  preConfigure = ''
+    sed -i 's/CONFIG += staticlib/CONFIG += shared/' dxflib.pro
+  '';
+  installPhase = ''
+    install -d -m 0755 $out/lib
+    cp -pr *.so* $out/lib
+    install -d -m 0755 $out/include/dxflib
+    cp -pr src/*.h $out/include/dxflib
+    # Generate pkg-config file
+    install -d -m 0755 $out/lib/pkgconfig
+    cat << 'EOF' > $out/lib/pkgconfig/dxflib.pc
+    prefix=${placeholder "out"}
+    libdir=${placeholder "out"}/lib
+    includedir=${placeholder "out"}/include
+    Name: dxflib
+    Description: A C++ library for reading and writing DXF files
+    Version: %{version}
+    Libs: -L${placeholder "out"}/lib -ldxflib
+    Cflags: -I${placeholder "out"}/include/dxflib
+    EOF
+  '';
+  doCheck = true;
+
+  meta = {
+    homepage = "https://qcad.org/en/90-dxflib";
+    maintainers = with lib.maintainers; [raskin];
+    platforms = lib.platforms.linux;
+    description = "DXF file format library";
+  };
+}