QmlJs: sync qmljs parser

The last version of the grammar contains some constructs that the code model
needs to know.

Task-number: QTCREATORBUG-17842
Change-Id: I6250f96431acc05b19f3fd1b6cc268a07485cf0f
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/qmljs/parser/qmljsengine_p.h

@@ -110,3 +110,4 @@ double integerFromString(const char *buf, int size, int radix);
 } // end of namespace QmlJS
 
 QT_QML_END_NAMESPACE
+