net/lwip: fix ipv6 hop-by-hop error handling
net/lwip: fix ipv6 hop-by-hop error handling

hop-by-hop header can come only at the first according to RFC2460
so if hop-by-hop options header comes as a second option header, send icmp parameter error.

related IPV6 Comformance test number: 10

Change-Id: Iaf988dd78572a8bf4cd207090b3675bf8edb0aaa
Signed-off-by: bossjisu <800dec47d2987cee7cc3d7aee71bc11b56f5042e@samsung.com>

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