[MacPorts] #53673: clang: use llvm-dsymutil

[MacPorts]

#53673: clang: use llvm-dsymutil
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  Reporter:  Ionic                               |      Owner:  jeremyhu
      Type:  defect                              |     Status:  new
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:
      Port:  clang-3.3 clang-3.4 clang-3.5       |
  clang-3.6 clang-3.7 clang-3.8 clang-3.9        |
  clang-4.0 clang-devel                          |
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Comment (by jeremyhu):

 The way cfe finds the tool makes this an easy change.  We just need to
 drop a symlink from dsymutil to llvm-dsymutil in the toolchain directory
 (eg: /opt/local/libexec/llvm-devel/bin)

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Ticket URL: <https://trac.macports.org/ticket/53673#comment:1>
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