[MacPorts] #35360: add portgroup for mpi compilers

[MacPorts]

#35360: add portgroup for mpi compilers
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 Reporter:  mmoll@…               |       Owner:  macports-tickets@…                   
     Type:  enhancement           |      Status:  new                                  
 Priority:  Normal                |   Milestone:                                       
Component:  ports                 |     Version:  2.1.2                                
 Keywords:  mpi, openmpi, mpich2  |        Port:                                       
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Changes (by ryandesign@…):

 * cc: Sean, Farley, <sean.michael.farley@…> (removed)
 * cc: sean.michael.farley@… (added)


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Ticket URL: <https://trac.macports.org/ticket/35360#comment:1>
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