Untie rbutil core logic from QtGui for cli:

- include QtCore instead of QtGui if possible
- replace qApp with QCoreApplication::instance(), as qApp is only defined for QtGui
- use QCoreApplication instead of QApplication for inherited static members.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16274 a1c6a512-1295-4272-9138-f99709370657

rbutil/rbutilqt/main.cpp

@@ -29,7 +29,7 @@ Q_IMPORT_PLUGIN(qtaccessiblewidgets)
 int main( int argc, char ** argv ) {
     QApplication app( argc, argv );
 
-    QString absolutePath = qApp->applicationDirPath();
+    QString absolutePath = QCoreApplication::instance()->applicationDirPath();
     // portable installation:
     // check for a configuration file in the program folder.
     QSettings *user;