Log Message:
devel/radare2: Update to 5.7.8 (codename "boredom") from 5.1.1 \ 
("lasagna")
and fix build on pkgsrc / NetBSD 9.x.

5.1.1->5.7.8 skips a handful of bug-fixing and refinement releases
that happened between Feb 2021 and Sep 2022. Way too many changes
to list here - see https://github.com/radareorg/radare2/releases

OK-ed by wiz during freeze.