net/lwip : bug fix, target address should be link-local address
net/lwip : bug fix, target address should be link-local address

This commit is patch to bug fix, target address should be link-local
address
 - as per RFC 4861, 8.1 Validation of Redirect Message
 -  The ICMP Target Address is either a link-local address (when
    redirected to a router) or the same as the ICMP Destination
    Address (when redirected to the on-link destination).

Change-Id: I0202fa02f3657c552ee5582575eb69ca67865221
Signed-off-by: Jin-Seong Kim <c7ef485e0ddc445bcfb224daa3f265bce32dcc94@samsung.com>

JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT