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/seccure/default.nix

@@ -0,0 +1,26 @@
+{ lib, stdenv, fetchurl, libgcrypt }:
+
+stdenv.mkDerivation rec {
+  pname = "seccure";
+  version = "0.5";
+
+  src = fetchurl {
+    url = "http://point-at-infinity.org/seccure/${pname}-${version}.tar.gz";
+    sha256 = "0nwnk3hfhgvf5xr0xipbh6smfnya22wphc5rj0vgi5d0zr5cwrk5";
+  };
+
+  buildInputs = [ libgcrypt ];
+
+  preConfigure = ''
+    sed -e s@/usr/@$out/@g -i Makefile
+    sed -e 's@ln -f@ln -sf@g' -i Makefile
+    mkdir -p $out/bin $out/share/man/man1
+  '';
+
+  meta = {
+    homepage = "http://point-at-infinity.org/seccure/";
+    description = "Zero-configuration elliptic curve cryptography utility";
+    platforms = lib.platforms.unix;
+    license = lib.licenses.lgpl3;
+  };
+}