[MacPorts] #44523: Upgrade arb 6.0 -> 6.0.1

[MacPorts]

#44523: Upgrade arb 6.0 -> 6.0.1
------------------------------+---------------------------------
  Reporter:  matt.cottrell@…  |      Owner:  ryandesign@…
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.3.1
Resolution:                   |   Keywords:  maintainer haspatch
      Port:  arb              |
------------------------------+---------------------------------
Changes (by ryandesign@…):

 * owner:  macports-tickets@… => ryandesign@…
 * status:  new => assigned


Old description:

> This patch resolves several outstanding issues with the arb port and
> brings it up to the latest version released by the upstream developers.
>
> Addresses the problem building arb on Lion
> [https://trac.macports.org/ticket/44368].
>
> Addresses problems detecting the compiler on older versions of OS X
> [https://trac.macports.org/ticket/44367]

New description:

 This patch resolves several outstanding issues with the arb port and
 brings it up to the latest version released by the upstream developers.

 Addresses the problem building arb on Lion: #44368

 Addresses problems detecting the compiler on older versions of OS X:
 #44367

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Ticket URL: <https://trac.macports.org/ticket/44523#comment:5>
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