Export QTimerInfoList

... so that QCocoaEventDispatcher can use it to implement timer handling
and benefit from the Qt::TimerType support in QTimerInfoList.

Change-Id: I34b81502465963e2c9d528df463fa2eccd275ad6
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/kernel/qtimerinfo_unix_p.h

@@ -77,7 +77,7 @@ struct QTimerInfo {
 #endif
 };
 
-class QTimerInfoList : public QList<QTimerInfo*>
+class Q_CORE_EXPORT QTimerInfoList : public QList<QTimerInfo*>
 {
 #if ((_POSIX_MONOTONIC_CLOCK-0 <= 0) && !defined(Q_OS_MAC)) || defined(QT_BOOTSTRAPPED)
     timeval previousTime;