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/archivers/ctrtool/default.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "ctrtool";
+  version = "0.7";
+
+  src = fetchFromGitHub {
+    owner  = "jakcron";
+    repo   = "Project_CTR";
+    rev    = "ctrtool-v${version}";
+    sha256 = "07aayck82w5xcp3si35d7ghybmrbqw91fqqvmbpjrjcixc6m42z7";
+  };
+
+  sourceRoot = "source/ctrtool";
+
+  makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" "CXX=${stdenv.cc.targetPrefix}c++"];
+  enableParallelBuilding = true;
+
+  installPhase = "
+    mkdir $out/bin -p
+    cp ctrtool${stdenv.hostPlatform.extensions.executable} $out/bin/
+  ";
+
+  meta = with lib; {
+    license = licenses.mit;
+    description = "A tool to extract data from a 3ds rom";
+    platforms = platforms.linux;
+    maintainers = [ maintainers.marius851000 ];
+  };
+
+}