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/tools/cbor-diag/default.nix

@@ -0,0 +1,31 @@
+{ lib, bundlerApp, bundlerUpdateScript }:
+
+bundlerApp {
+  pname = "cbor-diag";
+
+  gemdir = ./.;
+
+  exes = [
+    "cbor2diag.rb"
+    "cbor2json.rb"
+    "cbor2pretty.rb"
+    "cbor2yaml.rb"
+    "diag2cbor.rb"
+    "diag2pretty.rb"
+    "json2cbor.rb"
+    "json2pretty.rb"
+    "pretty2cbor.rb"
+    "pretty2diag.rb"
+    "yaml2cbor.rb"
+  ];
+
+  passthru.updateScript = bundlerUpdateScript "cbor-diag";
+
+  meta = with lib; {
+    description = "CBOR diagnostic utilities";
+    homepage    = "https://github.com/cabo/cbor-diag";
+    license     = with licenses; asl20;
+    maintainers = with maintainers; [ fdns nicknovitski ];
+    platforms   = platforms.unix;
+  };
+}