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/eggdrop/default.nix

@@ -0,0 +1,38 @@
+{ lib, stdenv, fetchFromGitHub, tcl }:
+
+stdenv.mkDerivation rec {
+  pname = "eggdrop";
+  version = "1.9.1";
+
+  src = fetchFromGitHub {
+    owner = "eggheads";
+    repo = "eggdrop";
+    rev = "v${version}";
+    sha256 = "sha256-vh8nym7aYeTRUQ7FBZRy4ToG2ajwRDhzi4jNiJQOEyQ=";
+  };
+
+  buildInputs = [ tcl ];
+
+  hardeningDisable = [ "format" ];
+
+  preConfigure = ''
+    prefix=$out/eggdrop
+    mkdir -p $prefix
+  '';
+
+  postConfigure = ''
+    make config
+  '';
+
+  configureFlags = [
+    "--with-tcllib=${tcl}/lib/lib${tcl.libPrefix}${stdenv.hostPlatform.extensions.sharedLibrary}"
+    "--with-tclinc=${tcl}/include/tcl.h"
+  ];
+
+  meta = with lib; {
+    license = licenses.gpl2;
+    platforms = platforms.unix;
+    homepage = "https://www.eggheads.org";
+    description = "An Internet Relay Chat (IRC) bot";
+  };
+}