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/wpa_supplicant.nix

@@ -0,0 +1,96 @@
+import ./make-test-python.nix ({ pkgs, lib, ...}:
+{
+  name = "wpa_supplicant";
+  meta = with lib.maintainers; {
+    maintainers = [ rnhmjoj ];
+  };
+
+  nodes.machine = { ... }: {
+    imports = [ ../modules/profiles/minimal.nix ];
+
+    # add a virtual wlan interface
+    boot.kernelModules = [ "mac80211_hwsim" ];
+
+    # wireless access point
+    services.hostapd = {
+      enable = true;
+      wpa = true;
+      interface = "wlan0";
+      ssid = "nixos-test";
+      wpaPassphrase = "reproducibility";
+    };
+
+    # wireless client
+    networking.wireless = {
+      # the override is needed because the wifi is
+      # disabled with mkVMOverride in qemu-vm.nix.
+      enable = lib.mkOverride 0 true;
+      userControlled.enable = true;
+      interfaces = [ "wlan1" ];
+      fallbackToWPA2 = true;
+
+      networks = {
+        # test WPA2 fallback
+        mixed-wpa = {
+          psk = "password";
+          authProtocols = [ "WPA-PSK" "SAE" ];
+        };
+        sae-only = {
+          psk = "password";
+          authProtocols = [ "SAE" ];
+        };
+
+        # test network
+        nixos-test.psk = "@PSK_NIXOS_TEST@";
+
+        # secrets substitution test cases
+        test1.psk = "@PSK_VALID@";              # should be replaced
+        test2.psk = "@PSK_SPECIAL@";            # should be replaced
+        test3.psk = "@PSK_MISSING@";            # should not be replaced
+        test4.psk = "P@ssowrdWithSome@tSymbol"; # should not be replaced
+      };
+
+      # secrets
+      environmentFile = pkgs.writeText "wpa-secrets" ''
+        PSK_NIXOS_TEST="reproducibility"
+        PSK_VALID="S0m3BadP4ssw0rd";
+        # taken from https://github.com/minimaxir/big-list-of-naughty-strings
+        PSK_SPECIAL=",./;'[]\-= <>?:\"{}|_+ !@#$%^\&*()`~";
+      '';
+    };
+
+  };
+
+  testScript =
+    ''
+      config_file = "/run/wpa_supplicant/wpa_supplicant.conf"
+
+      with subtest("Configuration file is inaccessible to other users"):
+          machine.wait_for_file(config_file)
+          machine.fail(f"sudo -u nobody ls {config_file}")
+
+      with subtest("Secrets variables have been substituted"):
+          machine.fail(f"grep -q @PSK_VALID@ {config_file}")
+          machine.fail(f"grep -q @PSK_SPECIAL@ {config_file}")
+          machine.succeed(f"grep -q @PSK_MISSING@ {config_file}")
+          machine.succeed(f"grep -q P@ssowrdWithSome@tSymbol {config_file}")
+
+      with subtest("WPA2 fallbacks have been generated"):
+          assert int(machine.succeed(f"grep -c sae-only {config_file}")) == 1
+          assert int(machine.succeed(f"grep -c mixed-wpa {config_file}")) == 2
+
+      # save file for manual inspection
+      machine.copy_from_vm(config_file)
+
+      with subtest("Daemon is running and accepting connections"):
+          machine.wait_for_unit("wpa_supplicant-wlan1.service")
+          status = machine.succeed("wpa_cli -i wlan1 status")
+          assert "Failed to connect" not in status, \
+                 "Failed to connect to the daemon"
+
+      with subtest("Daemon can connect to the access point"):
+          machine.wait_until_succeeds(
+            "wpa_cli -i wlan1 status | grep -q wpa_state=COMPLETED"
+          )
+    '';
+})