QmlJS: Add semantic errors to task window.

Task-number: QTCREATORBUG-4103
Reviewed-by: Leandro Melo

src/libs/qmljs/qmljsmodelmanagerinterface.h

@@ -142,6 +142,7 @@ signals:
     void documentChangedOnDisk(QmlJS::Document::Ptr doc);
     void aboutToRemoveFiles(const QStringList &files);
     void libraryInfoUpdated(const QString &path, const QmlJS::LibraryInfo &info);
+    void projectInfoUpdated(const ProjectInfo &pinfo);
 };
 
 } // namespace QmlJS