wireshark - security update

Multiple vulnerabilities were discovered in the dissectors/parsers for
PKTC, IAX2, GSM CBCH and NCP which could result in denial of service.

For the stable distribution (jessie), these problems have been fixed in
version 1.12.1+g01b65bf-4+deb8u6.

For the testing distribution (stretch), these problems have been fixed
in version 2.0.3+geed34f0-1.

For the unstable distribution (sid), these problems have been fixed in
version 2.0.3+geed34f0-1.

We recommend that you upgrade your wireshark packages.