wireshark: security bump to version 1.8.6

Fixes CVE-2013-2475, CVE-2013-2476, CVE-2013-2477, CVE-2013-2478,
CVE-2013-2479, CVE-2013-2480, CVE-2013-2481, CVE-2013-2482,
CVE-2013-2483, CVE-2013-2484, CVE-2013-2485, CVE-2013-2486,
CVE-2013-2487, and CVE-2013-2488.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>