Do not pass around a list of filenodes with all the known header files.
That list gets converted into a QSet<FilePath> and then that is used.
Just generate the QSet<FilePath> directly and avoid that conversion.
Change-Id: I2444a2a6b4a1600fe476e66673a1a2e9c8900764
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Reviewed-by: hjk <hjk@qt.io>