Recompiling QtWidgets on Mac fails with:
"ld: duplicate symbol qInitResources_qprintdialog() in
.obj/debug-shared/qrc_qprintdialog.o and
.obj/debug-shared/qprintdialog_unix.o "

Ifdef out the include from qprintdialog_unix,
leaving us with one instance of the synbol.

Change-Id: I7e1f45de65020253e0cad4155fca94944e66c177
Reviewed-on: http://codereview.qt.nokia.com/3270


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@nokia.com>