[MacPorts] #44225: hunspell: add missing xz dependency introduced by gettext

[MacPorts]

#44225: hunspell: add missing xz dependency introduced by gettext
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 Reporter:  ionic@…   |      Owner:  macports-tickets@…
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  haspatch  |       Port:  hunspell
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 hunspell's autoreconf calls autopoint, which needs xz for unpacking stuff
 (if necessary.)

 Add the missing build dependency.

 Build failure in trace mode, so no revbump.

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Ticket URL: <https://trac.macports.org/ticket/44225>
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