Support VCDs generated by Verilator in VcdParser
#557
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Description & Motivation
Verilator tends to produce slightly different VCD files than Icarus Verilog or ROHD. This PR adds some additional parsing to help for verification usages that parse Verilator (e.g. rohd-cosim).
Related Issue(s)
N/A
Testing
Added a new test that includes VCD generated by Verilator
Backwards-compatibility
No
Documentation
No