[MacPorts] #42241: leptonica: update to 1.70

[MacPorts]

#42241: leptonica: update to 1.70
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  Reporter:  ryandesign@…  |      Owner:  stromnov@…
      Type:  update        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  leptonica     |
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Comment (by ruzicka.jan@…):

 Can this library be updated to allow update of tesseract?
 the tesseract 3.03 is only in RC1, but it fails to compile because of
 leptonica version.

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Ticket URL: <https://trac.macports.org/ticket/42241#comment:1>
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