Setting wireshark_LINK means that wireshark_LDFLAGS isn't used; there's

Setting wireshark_LINK means that wireshark_LDFLAGS isn't used; there's
no need to set it for the GTK+ version, so don't.  (For Qt, we should
find some other way of forcing it to link wireshark-qt as a C++ program,
perhaps by having a wireshark-qt.cpp file in the top-level source
directory that contains main() and that calls the ui/qt code.)

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@50544 f5534014-38df-0310-8fa8-9805f1628bb7