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/mkp224o/default.nix

@@ -0,0 +1,47 @@
+{ stdenv, lib, fetchFromGitHub, autoreconfHook, libsodium }:
+
+stdenv.mkDerivation rec {
+  pname = "mkp224o";
+  version = "1.5.0";
+
+  src = fetchFromGitHub {
+    owner = "cathugger";
+    repo = "mkp224o";
+    rev = "v${version}";
+    sha256 = "0b2cn96wg4l8jkkqqp8l2295xlmm2jc8nrw6rdqb5g0zkpfmrxbb";
+  };
+
+  buildCommand =
+    let
+      # compile few variants with different implementation of crypto
+      # the fastest depends on a particular cpu
+      variants = [
+        { suffix = "ref10";         configureFlags = ["--enable-ref10"]; }
+        { suffix = "donna";         configureFlags = ["--enable-donna"]; }
+      ] ++ lib.optionals stdenv.hostPlatform.isx86 [
+        { suffix = "donna-sse2";    configureFlags = ["--enable-donna-sse2"]; }
+      ] ++ lib.optionals (!stdenv.isDarwin && stdenv.isx86_64) [
+        { suffix = "amd64-51-30k";  configureFlags = ["--enable-amd64-51-30k"]; }
+        { suffix = "amd64-64-20k";  configureFlags = ["--enable-amd64-64-24k"]; }
+      ];
+    in
+      lib.concatMapStrings ({suffix, configureFlags}: ''
+        install -D ${
+          stdenv.mkDerivation {
+            name = "mkp224o-${suffix}-${version}";
+            inherit version src configureFlags;
+            nativeBuildInputs = [ autoreconfHook ];
+            buildInputs = [ libsodium ];
+            installPhase = "install -D mkp224o $out";
+          }
+        } $out/bin/mkp224o-${suffix}
+      '') variants;
+
+  meta = with lib; {
+    description = "Vanity address generator for tor onion v3 (ed25519) hidden services";
+    homepage = "http://cathug2kyi4ilneggumrenayhuhsvrgn6qv2y47bgeet42iivkpynqad.onion/";
+    license = licenses.cc0;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ volth ];
+  };
+}