Fix build without PCH

These inclusions are necessary when compiling without pre-compiled headers.

Change-Id: I4345ad3f6882046e4b8f2ba9d315299e280c9f18
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/platformsupport/themes/genericunix/dbustray/qdbustrayicon.cpp

@@ -52,6 +52,9 @@
 #include <qdebug.h>
 #include <qrect.h>
 #include <qloggingcategory.h>
+#include <qstandardpaths.h>
+#include <qdir.h>
+#include <qmetaobject.h>
 #include <qpa/qplatformintegration.h>
 #include <qpa/qplatformservices.h>
 #include <qdbusconnectioninterface.h>

src/platformsupport/themes/genericunix/dbustray/qstatusnotifieritemadaptor.cpp

@@ -52,6 +52,9 @@
 
 #ifndef QT_NO_SYSTEMTRAYICON
 
+#include <QtCore/QLoggingCategory>
+#include <QtCore/QCoreApplication>
+
 #include "qdbustrayicon_p.h"
 
 QT_BEGIN_NAMESPACE

src/platformsupport/themes/genericunix/dbustray/qxdgnotificationproxy_p.h

@@ -65,6 +65,7 @@
 #include <QtCore/QObject>
 #include <QtCore/QByteArray>
 #include <QtCore/QList>
+#include <QtCore/QLoggingCategory>
 #include <QtCore/QMap>
 #include <QtCore/QString>
 #include <QtCore/QStringList>