wireshark: update to 1.12.1 (latest stable)

There are no references to g_memmove in the source anymore, so remove
the now unneeded (and failing!) sed fixup.

The Sourceforge Wireshark page tells users to download from
www.wireshark.org instead (so do that).
wireshark: add CLI and Qt versions

Currently we only have the GTK version. Now we also have a headless
version and a Qt version.