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/lxd-image-server.nix

@@ -0,0 +1,94 @@
+import ./make-test-python.nix ({ pkgs, lib, ... } :
+
+let
+  lxd-image = import ../release.nix {
+    configuration = {
+      # Building documentation makes the test unnecessarily take a longer time:
+      documentation.enable = lib.mkForce false;
+    };
+  };
+
+  lxd-image-metadata = lxd-image.lxdMeta.${pkgs.system};
+  lxd-image-rootfs = lxd-image.lxdImage.${pkgs.system};
+
+in {
+  name = "lxd-image-server";
+
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ mkg20001 patryk27 ];
+  };
+
+  nodes.machine = { lib, ... }: {
+    virtualisation = {
+      cores = 2;
+
+      memorySize = 2048;
+      diskSize = 4096;
+
+      lxc.lxcfs.enable = true;
+      lxd.enable = true;
+    };
+
+    security.pki.certificates = [
+      (builtins.readFile ./common/acme/server/ca.cert.pem)
+    ];
+
+    services.nginx = {
+      enable = true;
+    };
+
+    services.lxd-image-server = {
+      enable = true;
+      nginx = {
+        enable = true;
+        domain = "acme.test";
+      };
+    };
+
+    services.nginx.virtualHosts."acme.test" = {
+      enableACME = false;
+      sslCertificate = ./common/acme/server/acme.test.cert.pem;
+      sslCertificateKey = ./common/acme/server/acme.test.key.pem;
+    };
+
+    networking.hosts = {
+      "::1" = [ "acme.test" ];
+    };
+  };
+
+  testScript = ''
+    machine.wait_for_unit("sockets.target")
+    machine.wait_for_unit("lxd.service")
+    machine.wait_for_file("/var/lib/lxd/unix.socket")
+
+    # It takes additional second for lxd to settle
+    machine.sleep(1)
+
+    # lxd expects the pool's directory to already exist
+    machine.succeed("mkdir /var/lxd-pool")
+
+    machine.succeed(
+        "cat ${./common/lxd/config.yaml} | lxd init --preseed"
+    )
+
+    machine.succeed(
+        "lxc image import ${lxd-image-metadata}/*/*.tar.xz ${lxd-image-rootfs}/*/*.tar.xz --alias nixos"
+    )
+
+    loc = "/var/www/simplestreams/images/iats/nixos/amd64/default/v1"
+
+    with subtest("push image to server"):
+        machine.succeed("lxc launch nixos test")
+        machine.sleep(5)
+        machine.succeed("lxc stop -f test")
+        machine.succeed("lxc publish --public test --alias=testimg")
+        machine.succeed("lxc image export testimg")
+        machine.succeed("ls >&2")
+        machine.succeed("mkdir -p " + loc)
+        machine.succeed("mv *.tar.gz " + loc)
+
+    with subtest("pull image from server"):
+        machine.succeed("lxc remote add img https://acme.test --protocol=simplestreams")
+        machine.succeed("lxc image list img: >&2")
+  '';
+})