cad/librnd: update to 3.2.1
ChangeLog: http://www.repo.hu/projects/librnd/releases/changelog-3.2.1.txt
PR: 266698
Reported by: fuz@fuz.su (maintainer)
MFH: 2022Q4 (bugfix release)
(cherry picked from commit d7314106e352dbca8d2d00c744a1b3aa36370968)