Also removed the (conditional) invoke_token from DeclarationAST and use
the qt_invokable_token to store the Q_INVOKABLE, and fixed the ASTMatch
code generation.

For @synchornized when ObjC is disabled.

It now includes comma expressions, conditionals and assignment
expressions.

doing it in 1.3 as well to avoid possible later conflicts

Fixed semantic check for ObjC fast-enumeration for-loops, then merged it with the semantic check for the foreach.

Task-number: QTCREATORBUG-74