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/triehash/default.nix

@@ -0,0 +1,48 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, perlPackages
+}:
+
+stdenv.mkDerivation rec {
+  pname = "triehash";
+  version = "0.3";
+
+  src = fetchFromGitHub {
+    owner = "julian-klode";
+    repo = pname;
+    rev = "debian/0.3-3";
+    hash = "sha256-LxVcYj2WKHbhNu5x/DFkxQPOYrVkNvwiE/qcODq52Lc=";
+  };
+
+  nativeBuildInputs = [
+    perlPackages.perl
+  ];
+
+  postPatch = ''
+    patchShebangs triehash.pl
+  '';
+
+  dontConfigure = true;
+
+  dontBuild = true;
+
+  installPhase = ''
+    runHook preInstall
+
+    install -d $out/bin $out/share/doc/${pname}/ $out/share/${pname}/
+    install triehash.pl $out/bin/triehash
+    install README.md $out/share/doc/${pname}/
+    cp -r tests/ $out/share/${pname}/tests/
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/julian-klode/triehash";
+    description = "Order-preserving minimal perfect hash function generator";
+    license = with licenses; mit;
+    maintainers = with maintainers; [ AndersonTorres ];
+    platforms = perlPackages.perl.meta.platforms;
+  };
+}