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/development/libraries/libtasn1/default.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv, fetchurl, perl, texinfo }:
+
+stdenv.mkDerivation rec {
+  pname = "libtasn1";
+  version = "4.18.0";
+
+  src = fetchurl {
+    url = "mirror://gnu/libtasn1/libtasn1-${version}.tar.gz";
+    sha256 = "sha256-Q2XBVJU1Y9ZMZ6AktgfR7nXG23bg0PZXCeqAozTNGJg=";
+  };
+
+  outputs = [ "out" "dev" "devdoc" ];
+  outputBin = "dev";
+
+  nativeBuildInputs = [ texinfo perl ];
+
+  doCheck = true;
+  preCheck = if stdenv.isDarwin then
+    "export DYLD_LIBRARY_PATH=`pwd`/lib/.libs"
+  else
+    null;
+
+  meta = with lib; {
+    homepage = "https://www.gnu.org/software/libtasn1/";
+    description = "An ASN.1 library";
+    longDescription = ''
+      Libtasn1 is the ASN.1 library used by GnuTLS, GNU Shishi and some
+      other packages.  The goal of this implementation is to be highly
+      portable, and only require an ANSI C89 platform.
+    '';
+    license = licenses.lgpl2Plus;
+    platforms = platforms.all;
+  };
+}