Set CFBundleIdentifier prefix for Qt frameworks

This sets the prefix for frameworks to "org.qt-project".
Applications keep using the default Xcode preferences
prefix.

Task-number: QTBUG-32896
Change-Id: I67384f643888f2de3dd8e36b9bce0f04ca4e16dd
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>

mkspecs/features/qt_module.prf

@@ -94,6 +94,8 @@ else: \
 
 # OS X and iOS frameworks
 mac:CONFIG(shared, static|shared):contains(QT_CONFIG, qt_framework) {
+   # Set the CFBundleIdentifier prefix for Qt frameworks
+   QMAKE_TARGET_BUNDLE_PREFIX = org.qt-project
    #QMAKE_FRAMEWORK_VERSION = 4.0
    CONFIG += lib_bundle sliced_bundle qt_framework
    CONFIG -= qt_install_headers #no need to install these as well