sync: from linuxdeepin/dtkgui

Synchronize source files from linuxdeepin/dtkgui.

Source-pull-request: linuxdeepin/dtkgui#319

Author: deepin-ci-robot

src/kernel/dguiapplicationhelper.cpp

@@ -59,6 +59,7 @@
 #include <qpa/qplatformtheme.h>
 
 #ifdef Q_OS_LINUX
+#include <pwd.h>
 #include <unistd.h>
 #endif