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/hadoop/yarn.nix

@@ -0,0 +1,45 @@
+# This only tests if YARN is able to start its services
+import ../make-test-python.nix ({ package, ... }: {
+  name = "hadoop-yarn";
+
+  nodes = {
+    resourcemanager = { ... }: {
+      services.hadoop = {
+        inherit package;
+        yarn.resourcemanager = {
+          enable = true;
+          openFirewall = true;
+        };
+      };
+    };
+    nodemanager = { options, lib, ... }: {
+      services.hadoop = {
+        inherit package;
+        yarn.nodemanager = {
+          enable = true;
+          openFirewall = true;
+        };
+        yarnSite = options.services.hadoop.yarnSite.default // {
+          "yarn.resourcemanager.hostname" = "resourcemanager";
+          "yarn.nodemanager.log-dirs" = "/tmp/userlogs";
+        };
+      };
+    };
+  };
+
+  testScript = ''
+    start_all()
+
+    resourcemanager.wait_for_unit("yarn-resourcemanager")
+    resourcemanager.wait_for_unit("network.target")
+    resourcemanager.wait_for_open_port(8031)
+    resourcemanager.wait_for_open_port(8088)
+
+    nodemanager.wait_for_unit("yarn-nodemanager")
+    nodemanager.wait_for_unit("network.target")
+    nodemanager.wait_for_open_port(8042)
+
+    resourcemanager.succeed("curl -f http://localhost:8088")
+    nodemanager.succeed("curl -f http://localhost:8042")
+  '';
+})