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/shells/ion/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchFromGitHub, rustPlatform, Security, libiconv }:
+
+rustPlatform.buildRustPackage rec {
+  pname = "ion";
+  version = "unstable-2021-05-10";
+
+  src = fetchFromGitHub {
+    owner = "redox-os";
+    repo = "ion";
+    rev = "1170b84587bbad260a3ecac8e249a216cb1fd5e9";
+    sha256 = "sha256-lI1GwA3XerRJaC/Z8vTZc6GzRDLjv3w768C+Ui6Q+3Q=";
+  };
+
+  cargoSha256 = "sha256-hURpgxc99iIMtzIlR6Kbfqcbu1uYLDHnfVLqgmMbvFA=";
+
+  meta = with lib; {
+    description = "Modern system shell with simple (and powerful) syntax";
+    homepage = "https://gitlab.redox-os.org/redox-os/ion";
+    license = licenses.mit;
+    maintainers = with maintainers; [ dywedir ];
+  };
+
+  buildInputs = lib.optional stdenv.hostPlatform.isDarwin [
+    Security
+    libiconv
+  ];
+
+  doCheck = !stdenv.hostPlatform.isDarwin;
+
+  passthru = {
+    shellPath = "/bin/ion";
+  };
+}