wireshark: add version 1.10.2
lua: build with -fPIC so it can be linked into DSOs
wireshark: depends on lua, remove buggy icon install

the lack of a trailing slash on the install line caused every file
to be written into a file "wireshark", instead of into a directory
of that name.
however even with this bug, all icons are correctly displayed
so this step wasn't even needed.
add dumpcap-perms, which makes it possible to run wireshark as user