[MacPorts] #56478: mpfr: Update to version 4.0.1

[MacPorts]

#56478: mpfr: Update to version 4.0.1
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  Reporter:  BlackFrog1  |      Owner:  larryv
      Type:  update      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  haspatch
      Port:  mpfr        |
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Comment (by Schamschula):

 Updating the Portfile is not enough: There is a ABI change, so a dependent
 ports need to be rebuilt.

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Ticket URL: <https://trac.macports.org/ticket/56478#comment:3>
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