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/dnscrypt-wrapper/default.nix

@@ -0,0 +1,72 @@
+import ../make-test-python.nix ({ pkgs, ... }: {
+  name = "dnscrypt-wrapper";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ rnhmjoj ];
+  };
+
+  nodes = {
+    server = { lib, ... }:
+      { services.dnscrypt-wrapper = with builtins;
+          { enable = true;
+            address = "192.168.1.1";
+            keys.expiration = 5; # days
+            keys.checkInterval = 2;  # min
+            # The keypair was generated by the command:
+            # dnscrypt-wrapper --gen-provider-keypair \
+            #  --provider-name=2.dnscrypt-cert.server \
+            #  --ext-address=192.168.1.1:5353
+            providerKey.public = toFile "public.key" (readFile ./public.key);
+            providerKey.secret = toFile "secret.key" (readFile ./secret.key);
+          };
+        services.tinydns.enable = true;
+        services.tinydns.data = ''
+          ..:192.168.1.1:a
+          +it.works:1.2.3.4
+        '';
+        networking.firewall.allowedUDPPorts = [ 5353 ];
+        networking.firewall.allowedTCPPorts = [ 5353 ];
+        networking.interfaces.eth1.ipv4.addresses = lib.mkForce
+          [ { address = "192.168.1.1"; prefixLength = 24; } ];
+      };
+
+    client = { lib, ... }:
+      { services.dnscrypt-proxy2.enable = true;
+        services.dnscrypt-proxy2.upstreamDefaults = false;
+        services.dnscrypt-proxy2.settings = {
+          server_names = [ "server" ];
+          static.server.stamp = "sdns://AQAAAAAAAAAAEDE5Mi4xNjguMS4xOjUzNTMgFEHYOv0SCKSuqR5CDYa7-58cCBuXO2_5uTSVU9wNQF0WMi5kbnNjcnlwdC1jZXJ0LnNlcnZlcg";
+        };
+        networking.nameservers = [ "127.0.0.1" ];
+        networking.interfaces.eth1.ipv4.addresses = lib.mkForce
+          [ { address = "192.168.1.2"; prefixLength = 24; } ];
+      };
+
+  };
+
+  testScript = ''
+    start_all()
+
+    with subtest("The server can generate the ephemeral keypair"):
+        server.wait_for_unit("dnscrypt-wrapper")
+        server.wait_for_file("/var/lib/dnscrypt-wrapper/2.dnscrypt-cert.server.key")
+        server.wait_for_file("/var/lib/dnscrypt-wrapper/2.dnscrypt-cert.server.crt")
+
+    with subtest("The client can connect to the server"):
+        server.wait_for_unit("tinydns")
+        client.wait_for_unit("dnscrypt-proxy2")
+        assert "1.2.3.4" in client.succeed(
+            "host it.works"
+        ), "The IP address of 'it.works' does not match 1.2.3.4"
+
+    with subtest("The server rotates the ephemeral keys"):
+        # advance time by a little less than 5 days
+        server.succeed("date -s \"$(date --date '4 days 6 hours')\"")
+        client.succeed("date -s \"$(date --date '4 days 6 hours')\"")
+        server.wait_for_file("/var/lib/dnscrypt-wrapper/oldkeys")
+
+    with subtest("The client can still connect to the server"):
+        server.wait_for_unit("dnscrypt-wrapper")
+        client.succeed("host it.works")
+  '';
+})
+

nixos/tests/dnscrypt-wrapper/public.key

@@ -0,0 +1 @@
+A<>:<3A><08><><EFBFBD>B
<0A><><EFBFBD><EFBFBD><1B>;o<><6F>4<EFBFBD>S<EFBFBD>
@]

nixos/tests/dnscrypt-wrapper/secret.key

@@ -0,0 +1 @@
+G½>ֶ©»
 ל>׀א¥(ׂ²‡¼J•«÷=<3D>„<EFBFBD>ֱ<EFBFBD>lלA״:‎₪®©B
†»<E280A0><C2BB>—;oש¹4•S<E280A2>
@]