[MacPorts] #45000: Update Grace to version 5.1.24

[MacPorts]

#45000: Update Grace to version 5.1.24
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  Reporter:  feranick@…  |      Owner:  macports-tickets@…
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.1
Resolution:              |   Keywords:
      Port:  grace       |
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Comment (by ryandesign@…):

 I am trying to update this but running into problems. It seems to require
 `linuxdoc`, so first I had to fix the linuxdoc-utils port. Even so, it's
 now failing to find a required file, and I don't know what port provides
 it. Looking at the diff between the old and new version of grace I don't
 see what's changed regarding this. I should check if the old version
 builds or if it has the same error.

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Ticket URL: <https://trac.macports.org/ticket/45000#comment:1>
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