[MacPorts] #58908: port at 2.5.99 does not build clang-8.0.0_1; port at 2.5.4 does build it and so does the buildbot

[MacPorts]

#58908: port at 2.5.99 does not build clang-8.0.0_1; port at 2.5.4 does build it and so
does the buildbot
------------------------+--------------------
  Reporter:  snowflake  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  base       |    Version:  2.5.99
Resolution:             |   Keywords:
      Port:             |
------------------------+--------------------
Changes (by snowflake):

 * version:   => 2.5.99
 * component:  ports => base


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Ticket URL: <https://trac.macports.org/ticket/58908#comment:2>
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