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/misc/rkdeveloptool/default.nix

@@ -0,0 +1,27 @@
+{ lib, stdenv, fetchFromGitHub, autoreconfHook, pkg-config, libusb1 }:
+
+stdenv.mkDerivation {
+  pname = "rkdeveloptool";
+  version = "unstable-2021-02-03";
+
+  src = fetchFromGitHub {
+    owner = "rockchip-linux";
+    repo = "rkdeveloptool";
+    rev = "e607a5d6ad3f6af66d3daf3f6370e6dc9763a20d";
+    sha256 = "08m0yfds5rpr5l0s75ynfarq3hrv94l3aadld17cz5gqapqcfs2n";
+  };
+
+  nativeBuildInputs = [ autoreconfHook pkg-config ];
+
+  buildInputs = [ libusb1 ];
+
+  # main.cpp:1568:36: error: '%s' directive output may be truncated writing up to 557 bytes into a region of size 5
+  CPPFLAGS = "-Wno-error=format-truncation";
+
+  meta = with lib; {
+    homepage = "https://github.com/rockchip-linux/rkdeveloptool";
+    description = "A tool from Rockchip to communicate with Rockusb devices";
+    license = licenses.gpl2;
+    maintainers = [ maintainers.lopsided98 ];
+  };
+}