neko: Add patch fixing arg handling on 32bit.

The error was reported at HaxeFoundation/haxelib#152 and was fixed by
HaxeFoundation/neko#41 in HaxeFoundation/neko@ccc78c2, the latter being
fetchpatch'ed by us now.

This has caused the hxcpp build to fail on i686-linux with an "Invalid
array access" error.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>