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/package-management/cargo-kcov/default.nix

@@ -0,0 +1,35 @@
+{ lib
+, rustPlatform
+, fetchFromGitHub
+, makeWrapper
+, kcov
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "cargo-kcov";
+  version = "0.5.2";
+
+  src = fetchFromGitHub {
+    owner = "kennytm";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "0hqplgj3i8js42v2kj44khk543a93sk3n6wlfpv3c84pdqlm29br";
+  };
+
+  cargoSha256 = "0m5gfyjzzwd8wkbb388vmd785dy334x0migq3ssi7dlah9zx62bj";
+  doCheck = false;
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  postInstall = ''
+    wrapProgram $out/bin/cargo-kcov \
+        --prefix PATH : ${lib.makeBinPath [ kcov ]}
+  '';
+
+  meta = with lib; {
+    description = "Cargo subcommand to run kcov to get coverage report on Linux";
+    homepage = "https://github.com/kennytm/cargo-kcov";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ saschagrunert ];
+  };
+}