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/incron.nix

@@ -0,0 +1,52 @@
+import ./make-test-python.nix ({ pkgs, lib, ... }:
+
+{
+  name = "incron";
+  meta.maintainers = [ lib.maintainers.aanderse ];
+
+  nodes.machine =
+    { ... }:
+    { services.incron.enable = true;
+      services.incron.extraPackages = [ pkgs.coreutils ];
+      services.incron.systab = ''
+        /test IN_CREATE,IN_MODIFY,IN_CLOSE_WRITE,IN_MOVED_FROM,IN_MOVED_TO echo "$@/$# $%" >> /root/incron.log
+      '';
+
+      # ensure the directory to be monitored exists before incron is started
+      system.activationScripts.incronTest = ''
+        mkdir /test
+      '';
+    };
+
+  testScript = ''
+    start_all()
+
+    machine.wait_for_unit("multi-user.target")
+    machine.wait_for_unit("incron.service")
+
+    machine.succeed("test -d /test")
+    # create some activity for incron to monitor
+    machine.succeed("touch /test/file")
+    machine.succeed("echo foo >> /test/file")
+    machine.succeed("mv /test/file /root")
+    machine.succeed("mv /root/file /test")
+
+    machine.sleep(1)
+
+    # touch /test/file
+    machine.succeed("grep '/test/file IN_CREATE' /root/incron.log")
+
+    # echo foo >> /test/file
+    machine.succeed("grep '/test/file IN_MODIFY' /root/incron.log")
+    machine.succeed("grep '/test/file IN_CLOSE_WRITE' /root/incron.log")
+
+    # mv /test/file /root
+    machine.succeed("grep '/test/file IN_MOVED_FROM' /root/incron.log")
+
+    # mv /root/file /test
+    machine.succeed("grep '/test/file IN_MOVED_TO' /root/incron.log")
+
+    # ensure something unexpected is not present
+    machine.fail("grep 'IN_OPEN' /root/incron.log")
+  '';
+})