Packaging fixes for OSX and Windows

There is a regression in Qt 5.3.2 for OSX that triggers
segfaults from the serial port when polling the available
ports.

https://codereview.qt-project.org/#/c/95729/

However, 5.3.2 resolved some UI bugs on Linux. Thus, it makes
sense to run separate versions for the time being. Hopefully
this can be dropped with 5.3.3

In addition, windeployqt is not successfully recursing through our
plugins, so this explicitly lists those modules. Everything I've tested
indicates this creates a successful package.