qml/parser: update parser to Qt version 5.2.0

Change-Id: I22234b9d99bdebf05309ad79ed3b9233db5cff78
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/libs/qmljs/parser/qmljskeywords_p.h

@@ -47,12 +47,6 @@ QT_QML_BEGIN_NAMESPACE
 
 namespace QmlJS {
 
-// Note on the int() casts in the following code:
-// they casts values from Lexer's anonymous enum (aliasing some of the inherited
-// QmlJSGrammar::VariousConstants) to int when used with inherited values of the
-// enum QmlJSGrammar::VariousConstants in a ?: expression to suppress gcc
-// "enumeral mismatch" warning
-
 static inline int classify2(const QChar *s, bool qmlMode) {
   if (s[0].unicode() == 'a') {
     if (s[1].unicode() == 's') {