[MacPorts] #52551: ghc: bump llvm dep

[MacPorts]

#52551: ghc: bump llvm dep
-------------------------+------------------------
  Reporter:  grimreaper  |      Owner:  neverpanic
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.4
Resolution:              |   Keywords:  haspatch
      Port:  ghc         |
-------------------------+------------------------

Comment (by ryandesign):

 See https://github.com/macports/macports-ports/pull/70

--
Ticket URL: <https://trac.macports.org/ticket/52551#comment:8>
MacPorts <https://www.macports.org/>
Ports system for macOS