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/servers/http/lwan/default.nix

@@ -0,0 +1,39 @@
+{ lib, stdenv, fetchFromGitHub, pkg-config, zlib, cmake, enableJemalloc ? !stdenv.hostPlatform.isMusl, jemalloc }:
+
+stdenv.mkDerivation rec {
+  pname = "lwan";
+  version = "0.4";
+
+  src = fetchFromGitHub {
+    owner = "lpereira";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-Z8kiuZHLEupCKFrj8guiu9fTG7s+5KiQ6x0pg9iMy0c=";
+  };
+
+  nativeBuildInputs = [ cmake pkg-config ];
+
+  buildInputs = [ zlib ] ++ lib.optional enableJemalloc jemalloc;
+
+  # Note: tcmalloc and mimalloc are also supported (and normal malloc)
+  cmakeFlags = lib.optional enableJemalloc "-DUSE_ALTERNATIVE_MALLOC=jemalloc";
+
+  hardeningDisable = lib.optional stdenv.hostPlatform.isMusl "pie";
+
+  meta = with lib; {
+    description = "Lightweight high-performance multi-threaded web server";
+    longDescription = "A lightweight and speedy web server with a low memory
+      footprint (~500KiB for 10k idle connections), with minimal system calls and
+      memory allocation.  Lwan contains a hand-crafted HTTP request parser. Files are
+      served using the most efficient way according to their size: no copies between
+      kernel and userland for files larger than 16KiB.  Smaller files are sent using
+      vectored I/O of memory-mapped buffers. Header overhead is considered before
+      compressing small files.  Features include: mustache templating engine and IPv6
+      support.
+    ";
+    homepage = "https://lwan.ws/";
+    license = licenses.gpl2;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ leenaars ];
+  };
+}