Add the vpiFullName property to binary and string parameters.
Add the vpiFullName property to binary and string parameters.

This patch adds the missing vpiFullName property to binary and
string parameters (FYI real parameters are not currently supported
by the VPI interface).

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