build: compiling failed with Qt 6.9

Signed-off-by: ComixHe <heyuming@deepin.org>

Author: ComixHe

src/util/dicontheme.cpp

@@ -6,6 +6,7 @@
 #include "private/dbuiltiniconengine_p.h"
 #include "private/dciiconengine_p.h"
 #include "private/diconproxyengine_p.h"
+#include <private/qicon_p.h>
 #ifndef DTK_DISABLE_LIBXDG
 #include "private/xdgiconproxyengine_p.h"
 #else

src/util/private/dciiconengine.cpp

@@ -8,6 +8,7 @@
 
 #include <QPainter>
 #include <QPixmap>
+#include <QPixmapCache>
 
 #include <private/qhexstring_p.h>
 #include <private/qiconloader_p.h>