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/text/fst/default.nix

@@ -0,0 +1,38 @@
+{ lib
+, rustPlatform
+, fetchCrate
+, stdenv
+, libiconv
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "fst";
+  version = "0.4.2";
+
+  src = fetchCrate {
+    inherit version;
+    crateName = "fst-bin";
+    sha256 = "sha256-m9JDVHy+o4RYLGkYnhOpTuLyJjXtOwwl2SQpzRuz1m0=";
+  };
+
+  cargoSha256 = "sha256-RMjNk8tE7AYBYgys4IjCCfgPdDgwbYVmrWpWNBOf70E=";
+
+  buildInputs = lib.optionals stdenv.isDarwin [ libiconv ];
+
+  doInstallCheck = true;
+  installCheckPhase = ''
+    csv="$(mktemp)"
+    fst="$(mktemp)"
+    printf "abc,1\nabcd,1" > "$csv"
+    $out/bin/fst map "$csv" "$fst" --force
+    $out/bin/fst fuzzy "$fst" 'abc'
+    $out/bin/fst --help > /dev/null
+  '';
+
+  meta = with lib; {
+    description = "Represent large sets and maps compactly with finite state transducers";
+    homepage = "https://github.com/BurntSushi/fst";
+    license = with licenses; [ unlicense /* or */ mit ];
+    maintainers = with maintainers; [ rmcgibbo ];
+  };
+}