main/dovecot: fix failed build on 32bit arches

add patch posted to me by upstream author to fix failed tests on 32bit
arches
7 jobs for !16985 with 3.12-stable-dovecot-fix-time-util in 18 minutes and 24 seconds (queued for 1 second)
detached
Status Job ID Name Coverage
  Lint
failed #296735
docker-alpine x86_64 allowed to fail
lint

00:00:19

 
  Build
passed #296740
docker-alpine ci-build aarch64
build-aarch64

00:07:38

passed #296741
docker-alpine ci-build armv7
build-armv7

00:08:17

passed #296739
docker-alpine ci-build ppc64le
build-ppc64le

00:18:04

passed #296738
docker-alpine ci-build s390x
build-s390x

00:07:30

passed #296737
docker-alpine ci-build x86
build-x86

00:06:16

passed #296736
docker-alpine ci-build x86_64
build-x86_64

00:06:19

 
Name Stage Failure
failed
lint Lint
No job log