[MacPorts] #52844: Upgrade ocaml to 4.04.0

[MacPorts]

#52844: Upgrade ocaml to 4.04.0
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  Reporter:  pmetzger  |      Owner:  larryv
      Type:  update    |     Status:  accepted
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  haspatch
      Port:  ocaml     |
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Comment (by mf2k):

 Once added, the {{{epoch}}} line can never be removed. It is our method of
 allowing downgrades.

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Ticket URL: <https://trac.macports.org/ticket/52844#comment:10>
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