graphics/leptonica: fix build with openjpeg 2.5.0

ChangeLog: https://github.com/DanBloomberg/leptonica/issues/623

Fix detection of openjpeg 2.5.0

PR:     264684
Reported by:    vvd@unislabs.com
Approved by:    hiroto.kagotani@gmail.com (maintainer, timeout > 1 month)