Handle '?' in vl_to_vhdl_bit
Handle '?' in vl_to_vhdl_bit

The rough translation is '-', although the semantics are incompatible
in some cases (e.g. '-' = '1' is false)

CastMi/iverilog,CastMi/iverilog,themperek/iverilog,CastMi/iverilog,themperek/iverilog,themperek/iverilog