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/video/rav1e/default.nix

@@ -0,0 +1,42 @@
+{ lib, rust, stdenv, rustPlatform, fetchCrate, nasm, cargo-c, libiconv }:
+
+let
+  rustTargetPlatformSpec = rust.toRustTargetSpec stdenv.hostPlatform;
+in rustPlatform.buildRustPackage rec {
+  pname = "rav1e";
+  version = "0.5.1";
+
+  src = fetchCrate {
+    inherit pname version;
+    sha256 = "sha256-v2i/dMWos+nB3cRDOkROSOPb1ONRosbmp9RDZI2DLeI=";
+  };
+
+  cargoSha256 = "sha256-V9QbztkFj3t5yBV+yySysDy3Q6IUY4gNzBL8h23aEg4=";
+
+  nativeBuildInputs = [ nasm cargo-c ];
+  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+
+  checkType = "debug";
+
+  postBuild = ''
+    cargo cbuild --release --frozen --prefix=${placeholder "out"} --target ${rustTargetPlatformSpec}
+  '';
+
+  postInstall = ''
+    cargo cinstall --release --frozen --prefix=${placeholder "out"} --target ${rustTargetPlatformSpec}
+  '';
+
+  meta = with lib; {
+    description = "The fastest and safest AV1 encoder";
+    longDescription = ''
+      rav1e is an AV1 video encoder. It is designed to eventually cover all use
+      cases, though in its current form it is most suitable for cases where
+      libaom (the reference encoder) is too slow.
+      Features: https://github.com/xiph/rav1e#features
+    '';
+    homepage = "https://github.com/xiph/rav1e";
+    changelog = "https://github.com/xiph/rav1e/releases/tag/v${version}";
+    license = licenses.bsd2;
+    maintainers = [ ];
+  };
+}