[MacPorts] #45840: gcc49: update to 4.9.2

[MacPorts]

#45840: gcc49: update to 4.9.2
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  Reporter:  ryandesign@…  |      Owner:  mww@…
      Type:  update        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:  haspatch
      Port:  gcc49         |
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Comment (by larryv@…):

 I’ve [[attachment:gcc49.diff|updated your changes]] to include
 [https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63810#c4 the deployment
 target fix that I submitted upstream].

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Ticket URL: <https://trac.macports.org/ticket/45840#comment:8>
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