[MacPorts] #39521: Create llvm-3.4, clang-3.4, dragonegg-3.4 unstable ports

[MacPorts]

#39521: Create llvm-3.4, clang-3.4, dragonegg-3.4 unstable ports
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 Reporter:  larryv@…  |      Owner:  larryv@…
     Type:  request   |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  llvm-3.4 clang-3.4 dragonegg-3.4
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 A corollary to #39520.

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Ticket URL: <https://trac.macports.org/ticket/39521>
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