testsuite fails on 32bit architectures on musl 1.2 and newer

testsuite fails with musl 1.2. This is likely due to time_t being 64 bit with musl, even on 32 bit architectures.

knot/test_zone_events...........FAILED 19-20

ncopa-edge-x86:~/aports/main/knot/src/knot-3.2.6/tests$ ./knot/test_zone_events
ok 1 - create scheduler
ok 2 - create worker pool
ok 3 - zone events init
ok 4 - zone events setup
ok 5 - nothing planned
ok 6 - event load (not scheduled)
ok 7 - event refresh (not scheduled)
ok 8 - event update (not scheduled)
ok 9 - event expiration (scheduled)
ok 10 - event flush (scheduled)
ok 11 - event backup/restore (not scheduled)
ok 12 - event notify (not scheduled)
ok 13 - event re-sign (not scheduled)
ok 14 - event update-freeze (not scheduled)
ok 15 - event update-thaw (not scheduled)
ok 16 - event DS-check (not scheduled)
ok 17 - event DS-push (not scheduled)
ok 18 - flush is next
not ok 19 - expire is next
not ok 20 - nothing planned
1..20
# Looks like you failed 2 tests of 20

Downstream report: https://gitlab.alpinelinux.org/alpine/aports/-/issues/11773