[MacPorts] #52844: Upgrade ocaml to 4.04.0

[MacPorts]

#52844: Upgrade ocaml to 4.04.0
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 Reporter:  pmetzger  |      Owner:  macports-tickets@…
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.3.4
 Keywords:  haspatch  |       Port:  ocaml
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 Please upgrade ocaml to 4.04.0. A patch has been included, which simply
 bumps the revision number, fixes the checksum and renames one file (README
 is now README.adoc)

 A separate set of patches for camlp5 and the like are forthcoming, but
 this can be applied first.

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