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/applications/networking/datovka/default.nix

@@ -0,0 +1,32 @@
+{ lib
+, mkDerivation
+, fetchurl
+, libxml2
+, libisds
+, qmake
+, qtbase
+, qtsvg
+, pkg-config
+}:
+
+mkDerivation rec {
+  pname = "datovka";
+  version = "4.15.6";
+
+  src = fetchurl {
+    url = "https://secure.nic.cz/files/datove_schranky/${version}/${pname}-${version}.tar.xz";
+    sha256 = "1qs1yd9qqsf56jm9w6sffkqb2l8s3i9qgi2q8vd59ss19ym6yky2";
+  };
+
+  buildInputs = [ libisds qmake qtbase qtsvg libxml2 ];
+
+  nativeBuildInputs = [ pkg-config ];
+
+  meta = with lib; {
+    description = "Client application for operating Czech government-provided Databox infomation system";
+    homepage = "https://www.datovka.cz/";
+    license = licenses.lgpl3;
+    maintainers = [ maintainers.mmahut ];
+    platforms = platforms.linux;
+  };
+}