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/networking/wrk/default.nix

@@ -0,0 +1,45 @@
+{ lib, stdenv, fetchFromGitHub, luajit, openssl, perl }:
+
+stdenv.mkDerivation rec {
+  pname = "wrk";
+  version = "4.2.0";
+
+  src = fetchFromGitHub {
+    owner = "wg";
+    repo = "wrk";
+    rev = version;
+    sha256 = "sha256-nCfA444p7krXOB3qRtDKWxWj9tsrDZsGf03ThtE1dXM=";
+  };
+
+  buildInputs = [ luajit openssl perl ];
+
+  makeFlags = [ "WITH_LUAJIT=${luajit}" "WITH_OPENSSL=${openssl.dev}" "VER=${version}" ];
+
+  preBuild = ''
+    for f in src/*.h; do
+      substituteInPlace $f \
+        --replace "#include <luajit-2.0/" "#include <"
+    done
+  '';
+
+  NIX_CFLAGS_COMPILE = "-DluaL_reg=luaL_Reg"; # needed since luajit-2.1.0-beta3
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp wrk $out/bin
+  '';
+
+  meta = with lib; {
+    description = "HTTP benchmarking tool";
+    homepage = "https://github.com/wg/wrk";
+    longDescription = ''
+      wrk is a modern HTTP benchmarking tool capable of generating
+      significant load when run on a single multi-core CPU. It
+      combines a multithreaded design with scalable event notification
+      systems such as epoll and kqueue.
+    '';
+    license = licenses.asl20;
+    maintainers = with maintainers; [ ragge ];
+    platforms = platforms.unix;
+  };
+}