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/ipfs.nix

@@ -0,0 +1,44 @@
+import ./make-test-python.nix ({ pkgs, ...} : {
+  name = "ipfs";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ mguentner ];
+  };
+
+  nodes.machine = { ... }: {
+    services.ipfs = {
+      enable = true;
+      # Also will add a unix domain socket socket API address, see module.
+      startWhenNeeded = true;
+      apiAddress = "/ip4/127.0.0.1/tcp/2324";
+      dataDir = "/mnt/ipfs";
+    };
+  };
+
+  testScript = ''
+    start_all()
+
+    # IPv4 activation
+
+    machine.succeed("ipfs --api /ip4/127.0.0.1/tcp/2324 id")
+    ipfs_hash = machine.succeed(
+        "echo fnord | ipfs --api /ip4/127.0.0.1/tcp/2324 add | awk '{ print $2 }'"
+    )
+
+    machine.succeed(f"ipfs cat /ipfs/{ipfs_hash.strip()} | grep fnord")
+
+    # Unix domain socket activation
+
+    machine.stop_job("ipfs")
+
+    ipfs_hash = machine.succeed(
+        "echo fnord2 | ipfs --api /unix/run/ipfs.sock add | awk '{ print $2 }'"
+    )
+    machine.succeed(
+        f"ipfs --api /unix/run/ipfs.sock cat /ipfs/{ipfs_hash.strip()} | grep fnord2"
+    )
+
+    # Test if setting dataDir works properly with the hardened systemd unit
+    machine.succeed("test -e /mnt/ipfs/config")
+    machine.succeed("test ! -e /var/lib/ipfs/")
+  '';
+})