[MacPorts] #58441: "port upgrade libgcc8" pulls libgcc9 instead (and fails, of course). Also affects gcc8 port

[MacPorts]

#58441: "port upgrade libgcc8" pulls libgcc9 instead (and fails, of course). Also
affects gcc8 port
-------------------------+--------------------
  Reporter:  mouse07410  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  libgcc8     |
-------------------------+--------------------

Comment (by mf2k):

 The point is that it seems odd that libgcc8 requires libgcc9.

 {{{
 $ port deps libgcc8
 Full Name: libgcc8 @8.3.0_5
 Extract Dependencies: xz
 Library Dependencies:
 Runtime Dependencies: libgcc9
 }}}

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Ticket URL: <https://trac.macports.org/ticket/58441#comment:3>
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