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/misc/gh-cal/default.nix

@@ -0,0 +1,29 @@
+{ lib
+, stdenv
+, fetchCrate
+, rustPlatform
+, pkg-config
+, openssl
+, Security
+}:
+rustPlatform.buildRustPackage rec {
+  pname = "gh-cal";
+  version = "0.1.3";
+
+  src = fetchCrate {
+    inherit pname version;
+    sha256 = "sha256-x9DekflZoXxH964isWCi6YuV3v/iIyYOuRYVgKaUBx0=";
+  };
+
+  cargoSha256 = "sha256-73gqk0DjhaLGIEP5VQQlubPomxHQyg4RnY5XTgE7msQ=";
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ Security ];
+
+  meta = with lib; {
+    description = "GitHub contributions calender terminal viewer";
+    homepage = "https://github.com/mrshmllow/gh-cal";
+    license = licenses.mit;
+    maintainers = with maintainers; [ loicreynier ];
+  };
+}