How to map to a pointer to array of function symbols in a C header?

[kaushalmodi]

@shirleyquirk I just updated that `hello` proc's type in Nim guided by 
compilation errors and it [all 
worked](https://github.com/kaushalmodi/nim-svvpi/commit/739125687693108578bd222a19cb7d57ae7c8146)!!!

What that commit does is define a `hello` proc in Nim and that's called as 
`$hello` from SystemVerilog, and when that SystemVerilog simulation is run, I 
see:
    
    
    xcelium> run
    
    
    Hello!!
    
    Simulation complete via $finish(1) at time 0 FS + 1
    ./tb.sv:7     $finish;
    xcelium> exit
    
    
    Run

Many thanks for your help :)