[MacPorts] #37043: Update arb to 5.5

[MacPorts]

#37043: Update arb to 5.5
---------------------------------+--------------------------------
 Reporter:  matt.cottrell@…      |      Owner:  macports-tickets@…
     Type:  update               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:  2.1.2
 Keywords:  maintainer haspatch  |       Port:  arb
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 The attached patches update arb to version 5.5, which was released by the
 upstream developer last week.

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Ticket URL: <https://trac.macports.org/ticket/37043>
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