Ios: Enforce linking to CoreFoundation and IOKit

Change-Id: I78bf6623eddf83f4509e14b9e4600360656a0f13
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>

src/plugins/ios/ios.pro

@@ -5,6 +5,8 @@ include(../../qtcreatorplugin.pri)
 
 QT += xml network
 
+LIBS += -framework CoreFoundation -framework IOKit
+
 HEADERS += \
     iosconstants.h \
     iosconfigurations.h \