Note for the generation of new KnownTypes:

- in SystemC known types like sc_signal, sc_fifo and sc_mutex are
  taken as keywords by KaSCPar and put into the AST, i.e. there
  content is not translated

- thus, the implementation classes have to be renamed before and after
  parsing with KaSCPar (e.g., rename sc_fifo to sc_fifox before
  parsing, run KaSCPar and then rename sc_fifox back to sc_fifo in the
  resulting AST file)
