buildroot

wireshark: new package

This is only the bare minimum needed to build the textual tshark utility.
Support for more options, including the wireshark GUI, can be added later.

[Peter: point includedir at staging to workaround host/target headers issue]
Cc: Stefan Fröberg <stefan.froberg@petroprogram.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Acked-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Tested-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>