vlog95: Add preliminary logic gate name/range and assert logic pins in CA.
vlog95: Add preliminary logic gate name/range and assert logic pins in CA.

Add a preliminary gate name and range (zero based) for logic primitives.
Also assert that a logic gate in a continuous assignment has the correct
number of inputs/outputs.

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