Add Q_DECLARE_OPERATORS_FOR_FLAGS(QStandardPaths::LocateOptions)

QStandardPaths::LocateOptions was declared with Q_DECLARE_FLAGS(),
but missing Q_DECLARE_OPERATORS_FOR_FLAGS().

Change-Id: Id4ab1b1c86cdc9e79fb324d9b9d4d8deb659f718
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

src/corelib/io/qstandardpaths.h

@@ -108,6 +108,8 @@ private:
     ~QStandardPaths();
 };
 
+Q_DECLARE_OPERATORS_FOR_FLAGS(QStandardPaths::LocateOptions)
+
 #endif // QT_NO_STANDARDPATHS
 
 QT_END_NAMESPACE