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/ftp/kamid/default.nix

@@ -0,0 +1,38 @@
+{ stdenv
+, lib
+, pkg-config
+, libevent
+, libressl
+, libbsd
+, fetchurl
+, readline
+}:
+
+stdenv.mkDerivation rec {
+  pname = "kamid";
+  version = "0.1";
+
+  src = fetchurl {
+    url = "https://github.com/omar-polo/kamid/releases/download/${version}/${pname}-${version}.tar.gz";
+    sha256 = "16gi82dgaxwy8fgg05hbam796pk51i6xlyrx8qhghi7ikxr5jd19";
+  };
+
+  nativeBuildInputs = [
+    pkg-config
+  ];
+
+  buildInputs = [
+    libevent
+    libressl
+    readline
+    libbsd
+  ];
+
+  meta = with lib; {
+    description = "A FREE, easy-to-use and portable implementation of a 9p file server daemon for UNIX-like systems";
+    homepage = "https://kamid.omarpolo.com";
+    license = licenses.isc;
+    maintainers = with maintainers; [ heph2 ];
+    platforms = platforms.unix;
+  };
+}