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/gemset.nix

@@ -0,0 +1,23 @@
+{
+  bundler-audit = {
+    dependencies = ["thor"];
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "05k19l5388248rd74cn2lm2ksci7fzmga74n835v7k31m4kbzw8v";
+      type = "gem";
+    };
+    version = "0.9.0.1";
+  };
+  thor = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "18yhlvmfya23cs3pvhr1qy38y41b6mhr5q9vwv5lrgk16wmf3jna";
+      type = "gem";
+    };
+    version = "1.1.0";
+  };
+}