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>

nixos/tests/cadvisor.nix

@@ -0,0 +1,34 @@
+import ./make-test-python.nix ({ pkgs, ... } : {
+  name = "cadvisor";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ offline ];
+  };
+
+  nodes = {
+    machine = { ... }: {
+      services.cadvisor.enable = true;
+    };
+
+    influxdb = { lib, ... }: with lib; {
+      services.cadvisor.enable = true;
+      services.cadvisor.storageDriver = "influxdb";
+      services.influxdb.enable = true;
+    };
+  };
+
+  testScript =  ''
+      start_all()
+      machine.wait_for_unit("cadvisor.service")
+      machine.succeed("curl -f http://localhost:8080/containers/")
+
+      influxdb.wait_for_unit("influxdb.service")
+
+      # create influxdb database
+      influxdb.succeed(
+          'curl -f -XPOST http://localhost:8086/query --data-urlencode "q=CREATE DATABASE root"'
+      )
+
+      influxdb.wait_for_unit("cadvisor.service")
+      influxdb.succeed("curl -f http://localhost:8080/containers/")
+    '';
+})