[PATCH v7] ip_frag: add IPv4 options fragment and test data

[Ananyev, Konstantin]

> According to RFC791,the options may appear or not in datagrams.
> They must be implemented by all IP modules (host and gateways).
> What is optional is their transmission in any particular datagram,
> not their implementation.So we have to deal with it during the
> fragmenting process.Add some test data for the IPv4 header optional
> field fragmenting.
> 
> Signed-off-by: Huichao Cai <chcchc88 at 163.com>
> ---

Acked-by: Konstantin Ananyev <konstantin.ananyev at intel.com>

> 1.8.3.1