[MacPorts] #37446: cppunit: configure failure with automake 1.13

[MacPorts]

#37446: cppunit: configure failure with automake 1.13
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 Reporter:  ryandesign@…  |      Owner:  mww@…
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.1.2
 Keywords:  haspatch      |       Port:  cppunit
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 This patch fixes the configure failure of cppunit with automake 1.13
 installed.

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Ticket URL: <https://trac.macports.org/ticket/37446>
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