Move Q_DECLARE_OPERATORS_FOR_FLAGS out of namespaces.

If this macro is used inside a namespace, it hides global operators.

Reviewed-by: hjk

src/plugins/qt4projectmanager/qtversionmanager.h

@@ -179,8 +179,6 @@ private:
     mutable QString m_linguistCommand;
 };
 
-Q_DECLARE_OPERATORS_FOR_FLAGS(QtVersion::QmakeBuildConfigs)
-
 struct QMakeAssignment
 {
     QString variable;
@@ -255,4 +253,6 @@ private:
 
 } // namespace Qt4ProjectManager
 
+Q_DECLARE_OPERATORS_FOR_FLAGS(Qt4ProjectManager::QtVersion::QmakeBuildConfigs)
+
 #endif // QTVERSIONMANAGER_H