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/opencryptoki/default.nix

@@ -0,0 +1,41 @@
+{ lib, stdenv, fetchFromGitHub, openssl, trousers, autoreconfHook, libtool, bison, flex }:
+
+stdenv.mkDerivation rec {
+  pname = "opencryptoki";
+  version = "3.8.2";
+
+  src = fetchFromGitHub {
+    owner = "opencryptoki";
+    repo = "opencryptoki";
+    rev = "v${version}";
+    sha256 = "1rf7cmibmx636vzv7p54g212478a8wim2lfjf2861hfd0m96nv4l";
+  };
+
+  nativeBuildInputs = [ autoreconfHook libtool bison flex ];
+  buildInputs = [ openssl trousers ];
+
+  postPatch = ''
+    substituteInPlace configure.ac \
+      --replace "usermod" "true" \
+      --replace "groupadd" "true" \
+      --replace "chmod" "true" \
+      --replace "chgrp" "true"
+    substituteInPlace usr/lib/Makefile.am --replace "DESTDIR" "out"
+  '';
+
+  configureFlags = [
+    "--prefix=$(out)"
+    "--disable-ccatok"
+    "--disable-icatok"
+  ];
+
+  enableParallelBuilding = true;
+
+  meta = with lib; {
+    description = "PKCS#11 implementation for Linux";
+    homepage    = "https://github.com/opencryptoki/opencryptoki";
+    license     = licenses.cpl10;
+    maintainers = [ maintainers.tstrobel ];
+    platforms   = platforms.unix;
+  };
+}