sysutils/snapraid: Update to 12.2

• A patch release, adding support for files with timestamps prior to 1970.

ChangeLog: https://github.com/amadvance/snapraid/releases/tag/v12.2
PR: 265958
MFH: 2022Q3
(cherry picked from commit 67786a84786979a61dc656a902070d1b40ca5f22)