port select llvm-3.9 fails due to deprecated macho-dump

[kenneth.f.cunningham@…]

port select llvm mp-llvm-3.9 fails due to presumed but nonexistant file

/opt/local/bin/macho-dump-mp-3.9

the following generates a nothing file that makes the port select work by generating the missing reference

sudo touch /opt/local/bin/macho-dump-mp-3.9

but the port select llvm mechanism will presumably need to be updated as the macho-dump application has been deprecated

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