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/yajl/default.nix

@@ -0,0 +1,27 @@
+{ lib, stdenv, fetchFromGitHub, cmake }:
+
+stdenv.mkDerivation rec {
+  pname = "yajl";
+  version = "2.1.0";
+
+  src = fetchFromGitHub {
+    owner = "lloyd";
+    repo = "yajl";
+    rev = version;
+    sha256 = "00yj06drb6izcxfxfqlhimlrb089kka0w0x8k27pyzyiq7qzcvml";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  meta = {
+    description = "Yet Another JSON Library";
+    longDescription = ''
+      YAJL is a small event-driven (SAX-style) JSON parser written in ANSI
+      C, and a small validating JSON generator.
+    '';
+    homepage = "http://lloyd.github.com/yajl/";
+    license = lib.licenses.isc;
+    platforms = with lib.platforms; linux ++ darwin;
+    maintainers = with lib.maintainers; [ maggesi ];
+  };
+}