[MacPorts] #47686: iverilog: update to @0.9.7

[MacPorts]

#47686: iverilog: update to @0.9.7
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 Reporter:  jpo@…     |      Owner:  macports-tickets@…
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.3.3
 Keywords:  haspatch  |       Port:  iverilog
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 Also improved post-destroot doc installation. Refactored it to glob, and
 was missing relevant docs from some subdirs.

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Ticket URL: <https://trac.macports.org/ticket/47686>
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