bug#65381: leptonica 1.83.1 installation failed

[Herman Rimm]

Hello,

#68560 disables this failing test. You can apply that patch series or
just add this build-phase to the leptonica package definition:

  (add-after 'unpack 'disable-failing-tests
    (lambda _
      (substitute* "prog/Makefile.am"
        (("ioformats_reg") ""); Fails for unclear reason.
        (("pngio_reg") "")))) ; Fails non-deterministically.

Cheers,
Herman Rimm