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/tools/security/bundler-audit/default.nix

@@ -0,0 +1,29 @@
+{ bundlerEnv, ruby, lib, bundlerUpdateScript }:
+
+bundlerEnv rec {
+  name = "${pname}-${version}";
+  pname = "bundler-audit";
+  version = (import ./gemset.nix).bundler-audit.version;
+
+  inherit ruby;
+  gemdir = ./.;
+
+  passthru.updateScript = bundlerUpdateScript "bundler-audit";
+
+  meta = with lib; {
+    description = "Patch-level verification for Bundler";
+    longDescription = ''
+      Features:
+      - Checks for vulnerable versions of gems in Gemfile.lock.
+      - Checks for insecure gem sources (http://).
+      - Allows ignoring certain advisories that have been manually worked around.
+      - Prints advisory information.
+      - Does not require a network connection.
+    '';
+    homepage    = "https://github.com/rubysec/bundler-audit";
+    changelog   = "https://github.com/rubysec/bundler-audit/blob/v${version}/ChangeLog.md";
+    license     = licenses.gpl3Plus;
+    maintainers = with maintainers; [ primeos nicknovitski ];
+    platforms   = platforms.unix;
+  };
+}