[MacPorts] #43762: Update arb to 6.0-rc2

[MacPorts]

#43762: Update arb to 6.0-rc2
------------------------------+---------------------------------
  Reporter:  matt.cottrell@…  |      Owner:  macports-tickets@…
      Type:  update           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.2.1
Resolution:                   |   Keywords:  haspatch maintainer
      Port:  arb              |
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Comment (by matt.cottrell@…):

 I need to know what version of the OS you are using.

 Please type sw_vers in the terminal and post the results here.

 For me it looks like this:

 {{{
 cottrell% sw_vers
 ProductName:    Mac OS X
 ProductVersion: 10.9.3
 BuildVersion:   13D65
 }}}


 Thanks

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Ticket URL: <https://trac.macports.org/ticket/43762#comment:2>
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