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>

pkgs/tools/nix/nix-output-monitor/default.nix

@@ -0,0 +1,23 @@
+{
+  haskell,
+  expect,
+  haskellPackages,
+  installShellFiles,
+}: let
+  inherit (haskell.lib.compose) justStaticExecutables overrideCabal;
+  overrides = {
+    passthru.updateScript = ./update.sh;
+    testTarget = "unit-tests";
+    buildTools = [installShellFiles];
+    postInstall = ''
+      substitute "exe-sh/nom-build" "$out/bin/nom-build" \
+        --replace 'unbuffer' '${expect}/bin/unbuffer' \
+        --replace 'nom' "$out/bin/nom"
+      chmod a+x $out/bin/nom-build
+      installShellCompletion --zsh --name _nom-build completions/completion.zsh
+    '';
+  };
+in
+  justStaticExecutables
+  (overrideCabal overrides
+    (haskellPackages.callPackage ./generated-package.nix {}))