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/misc/xcd/default.nix

@@ -0,0 +1,29 @@
+{ lib, stdenv, fetchurl, ncurses }:
+
+stdenv.mkDerivation rec {
+  pname = "xcd";
+  version = "1.2";
+
+  src = fetchurl {
+    url = "https://www.muppetlabs.com/~breadbox/pub/software/${pname}-${version}.tar.gz";
+    sha256 = "1cgwspy08q05rhxbp7m1yrrix252i9jzfcfbzmhdvlgf5bfpl25g";
+  };
+
+  buildInputs = [ ncurses ];
+
+  makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
+
+  installPhase = ''
+    runHook preInstall
+    install -D $pname $out/bin/$pname
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Colorized hexdump tool";
+    homepage = "https://www.muppetlabs.com/~breadbox/software/xcd.html";
+    maintainers = [ maintainers.xfnw ];
+    license = licenses.mit;
+    platforms = platforms.unix;
+  };
+}