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/security/whatweb/default.nix

@@ -0,0 +1,50 @@
+{ lib, stdenv, fetchFromGitHub, bundlerEnv, ruby }:
+
+let
+  gems = bundlerEnv {
+    name = "whatweb-env";
+    inherit ruby;
+    gemdir = ./.;
+  };
+
+in stdenv.mkDerivation rec {
+  pname = "whatweb";
+  version = "0.5.5";
+
+  src = fetchFromGitHub {
+    owner = "urbanadventurer";
+    repo = "whatweb";
+    rev = "v${version}";
+    sha256 = "sha256-HLF55x4C8n8aPO4SI0d6Z9wZe80krtUaGUFmMaYRBIE=";
+  };
+
+  prePatch = ''
+    substituteInPlace Makefile \
+      --replace "/usr/local" "$out" \
+      --replace "/usr" "$out"
+  '';
+
+  buildInputs = [ gems ];
+
+  installPhase = ''
+    runHook preInstall
+
+    raw=$out/share/whatweb/whatweb
+    rm $out/bin/whatweb
+    cat << EOF >> $out/bin/whatweb
+    #!/bin/sh -e
+    exec ${gems}/bin/bundle exec ${ruby}/bin/ruby "$raw" "\$@"
+    EOF
+    chmod +x $out/bin/whatweb
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Next generation web scanner";
+    homepage = "https://github.com/urbanadventurer/whatweb";
+    license = licenses.gpl2Only;
+    maintainers = with maintainers; [ wolfangaukang ];
+    platforms = platforms.unix;
+  };
+}