main/tcpdump: fix CVE-2020-8037

See: #12120
7 jobs for !14887 with 3.9-tcpdump in 3 minutes and 51 seconds (queued for 59 seconds)
detached
Status Job ID Name Coverage
  Lint
passed #253241
docker-alpine x86_64
lint

00:01:19

 
  Build
passed #253249
docker-alpine ci-build aarch64
build-aarch64

00:00:25

passed #253250
docker-alpine ci-build armv7
build-armv7

00:00:35

passed #253248
docker-alpine ci-build ppc64le
build-ppc64le

00:00:33

passed #253247
docker-alpine ci-build s390x
build-s390x

00:00:45

passed #253245
docker-alpine ci-build x86
build-x86

00:00:25

passed #253243
docker-alpine ci-build x86_64
build-x86_64

00:00:23