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/protobufc/generic.nix

@@ -0,0 +1,21 @@
+{ lib, stdenv, src, version
+, autoreconfHook, pkg-config, protobuf, zlib
+, ...
+}:
+
+stdenv.mkDerivation {
+  pname = "protobuf-c";
+  inherit version;
+
+  inherit src;
+
+  nativeBuildInputs = [ autoreconfHook pkg-config ];
+  buildInputs = [ protobuf zlib ];
+
+  meta = with lib; {
+    homepage = "https://github.com/protobuf-c/protobuf-c/";
+    description = "C bindings for Google's Protocol Buffers";
+    license = licenses.bsd2;
+    platforms = platforms.all;
+  };
+}