test/bpf: do not require DNS lookup

test/bpf: do not require DNS lookup

These tests were using strings with hostname (dpdk.org) and this makes
test code do a DNS lookup. In container environment used for OpenSuse
build, DNS is unavailable. Replace dpdk.org with an IPv4 address
reserved for documentation (RFC5737) and use IPv6 in one example
(RFC3849). Actual addresses don't matter for this test which is
validating that code generated in classic BPF can be successfully
converted to eBPF.

Fixes: 2eccf6afbea9 ("bpf: add function to convert classic BPF to DPDK BPF")
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Luca Boccassi <bluca@debian.org>