Qt5CoreConfigExtras.cmake sets Qt5::qmake. Use it to find the
corresponding path to macdeployqt and use those in osx-app.sh.
Change-Id: I2e67f0126e272fc95d40476b9bfc83ab38d73cee
Reviewed-on: https://code.wireshark.org/review/28359
Reviewed-by: Gerald Combs <gerald@wireshark.org>
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>