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/games/crossfire/crossfire-server.nix

@@ -0,0 +1,37 @@
+{ stdenv, lib, fetchsvn, autoreconfHook,
+  autoconf, automake, libtool, flex, perl, check, pkg-config, python3,
+  version, rev, sha256, maps, arch }:
+
+stdenv.mkDerivation rec {
+  pname = "crossfire-server";
+  version = rev;
+
+  src = fetchsvn {
+    url = "http://svn.code.sf.net/p/crossfire/code/server/trunk/";
+    inherit sha256;
+    rev = "r${rev}";
+  };
+
+  nativeBuildInputs = [ autoconf automake libtool flex perl check pkg-config python3 ];
+  hardeningDisable = [ "format" ];
+
+  preConfigure = ''
+    ln -s ${arch} lib/arch
+    ln -s ${maps} lib/maps
+    sh autogen.sh
+  '';
+
+  configureFlags = [ "--with-python=${python3}" ];
+
+  postInstall = ''
+    ln -s ${maps} "$out/share/crossfire/maps"
+  '';
+
+  meta = with lib; {
+    description = "Server for the Crossfire free MMORPG";
+    homepage = "http://crossfire.real-time.com/";
+    license = licenses.gpl2Plus;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ ToxicFrog ];
+  };
+}