[MacPorts] #61636: gcc-devel: install on ARM64

[MacPorts]

#61636: gcc-devel: install on ARM64
------------------------+----------------------
  Reporter:  jpanetta   |      Owner:  (none)
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.6.4
Resolution:             |   Keywords:  arm64
      Port:  gcc-devel  |
------------------------+----------------------

Comment (by jpanetta):

 For what it's worth, this change to `compilers-1.0.tcl` was enough to get
 me building `OpenBLAS` using `gcc-devel` (my original goal before going
 down this rabbit hole):

 https://github.com/jpanetta/macports-
 ports/commit/c92eade99239d8e23cbba770e0bf99ab78de8594

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Ticket URL: <https://trac.macports.org/ticket/61636#comment:54>
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