[MacPorts] #47546: Create gcc51 for the released gcc 5.1

[MacPorts]

#47546: Create gcc51 for the released gcc 5.1
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 Reporter:  anders@…  |      Owner:  macports-tickets@…
     Type:  request   |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.3.3
 Keywords:            |       Port:  gcc5
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 Since GCC 5 was released (with version number 5.1) it'd be great to have
 access to that version in macports.

 See https://gcc.gnu.org/gcc-5/

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Ticket URL: <https://trac.macports.org/ticket/47546>
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