traceroute: Add indirection of symbol to remove clash with sanitizers

Add indirection and symbol renaming under MKSANITIZER for the linked in
version of getifaddrs.

Use RUMPPRG. I think it's safe to say there's not going to be a
new upstream version of traceroute to import.

AS# lookup is still done using host networking. Rationale: the
relevance to where that

Use RUMPPRG. I think it's safe to say there's not going to be a
new upstream version of traceroute to import.

AS# lookup is still done using host networking. Rationale: the
relevance to where that data comes from with respect to network
tracing is zero (be it socket, local file, db, whatever).

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