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/msgpack/default.nix

@@ -0,0 +1,12 @@
+{ callPackage, fetchFromGitHub, ... } @ args:
+
+callPackage ./generic.nix (args // rec {
+  version = "3.3.0";
+
+  src = fetchFromGitHub {
+    owner  = "msgpack";
+    repo   = "msgpack-c";
+    rev    = "cpp-${version}";
+    sha256 = "02dxgzxlwn8g9ca2j4m0rjvdq1k2iciy6ickj615daz5w8pcjajd";
+  };
+})

pkgs/development/libraries/msgpack/generic.nix

@@ -0,0 +1,23 @@
+{ lib, stdenv, cmake
+, version, src, patches ? [ ]
+, ...
+}:
+
+stdenv.mkDerivation {
+  pname = "msgpack";
+  inherit version;
+
+  inherit src patches;
+
+  nativeBuildInputs = [ cmake ];
+
+  cmakeFlags = lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) "-DMSGPACK_BUILD_EXAMPLES=OFF";
+
+  meta = with lib; {
+    description = "MessagePack implementation for C and C++";
+    homepage    = "https://msgpack.org";
+    license     = licenses.asl20;
+    maintainers = with maintainers; [ redbaron ];
+    platforms   = platforms.all;
+  };
+}