Doc: Fix qdoc warnings about missing \inmodule

Change-Id: Id04ac0d4825ad3e8489c0db186425e049e2c6108
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>

src/corelib/kernel/qobject.cpp

@@ -503,6 +503,7 @@ void QMetaCallEvent::placeMetaCall(QObject *object)
     \brief Exception-safe wrapper around QObject::blockSignals()
     \since 5.3
     \ingroup objectmodel
+    \inmodule QtCore
 
     \reentrant
 

src/corelib/thread/qfuture.qdoc

@@ -352,6 +352,7 @@
 /*! \class QFuture::const_iterator
     \reentrant
     \since 4.4
+    \inmodule QtCore
 
     \brief The QFuture::const_iterator class provides an STL-style const
     iterator for QFuture.