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/libjson/default.nix

@@ -0,0 +1,28 @@
+{ lib, stdenv, fetchurl, unzip }:
+
+stdenv.mkDerivation rec {
+  pname = "libjson";
+  version = "7.6.1";
+  src = fetchurl {
+    url = "mirror://sourceforge/libjson/libjson_${version}.zip";
+    sha256 = "0xkk5qc7kjcdwz9l04kmiz1nhmi7iszl3k165phf53h3a4wpl9h7";
+  };
+  patches = [ ./install-fix.patch ];
+  nativeBuildInputs = [ unzip ];
+  makeFlags = [ "prefix=$(out)" ];
+  NIX_CFLAGS_COMPILE = [ "-std=c++11" ];
+  preInstall = "mkdir -p $out/lib";
+
+  meta = with lib; {
+    homepage = "http://libjson.sourceforge.net/";
+    description = "A JSON reader and writer";
+    longDescription = ''
+      A JSON reader and writer which is super-efficient and
+      usually runs circles around other JSON libraries.
+      It's highly customizable to optimize for your particular project, and
+      very lightweight. For Windows, OSX, or Linux. Works in any language.
+    '';
+    platforms = platforms.unix;
+    license = licenses.bsd2;
+  };
+}