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/development/tools/cargo-flamegraph/default.nix

@@ -0,0 +1,40 @@
+{ lib, stdenv, fetchFromGitHub, rustPlatform, makeWrapper, perf, nix-update-script
+, Security
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "cargo-flamegraph";
+  version = "0.5.1";
+
+  src = fetchFromGitHub {
+    owner = "flamegraph-rs";
+    repo = "flamegraph";
+    rev = "v${version}";
+    sha256 = "sha256-Q930PIGncUX2Wz3hA1OQu0TEPMfOu2jMpBPbaAVlUMU=";
+  };
+
+  cargoSha256 = "sha256-ENL1FeIn9HESyp1VhePr4q7BLCc0SS8NAuHKv1crJE8=";
+
+  nativeBuildInputs = lib.optionals stdenv.isLinux [ makeWrapper ];
+  buildInputs = lib.optionals stdenv.isDarwin [
+    Security
+  ];
+
+  postFixup = lib.optionalString stdenv.isLinux ''
+    wrapProgram $out/bin/cargo-flamegraph \
+      --set-default PERF ${perf}/bin/perf
+    wrapProgram $out/bin/flamegraph \
+      --set-default PERF ${perf}/bin/perf
+  '';
+
+  passthru.updateScript = nix-update-script {
+    attrPath = pname;
+  };
+
+  meta = with lib; {
+    description = "Easy flamegraphs for Rust projects and everything else, without Perl or pipes <3";
+    homepage = "https://github.com/ferrous-systems/flamegraph";
+    license = with licenses; [ asl20 /* or */ mit ];
+    maintainers = with maintainers; [ killercup ];
+  };
+}