testing/bird: backport fix for gcc 10

upstream commit: https://gitlab.nic.cz/labs/bird/-/commit/4bbc10614f3431c37e6352f5a6ea5c693c31021e
7 jobs for !11634 with bird-init-fixes in 1 minute and 21 seconds
latest detached
Status Job ID Name Coverage
  Lint
passed #197642
docker-alpine x86_64
lint

00:00:22

 
  Build
passed #197647
docker-alpine ci-build aarch64
build-aarch64

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passed #197648
docker-alpine ci-build armv7
build-armv7

00:00:31

passed #197646
docker-alpine ci-build ppc64le
build-ppc64le

00:00:43

passed #197645
docker-alpine ci-build s390x
build-s390x

00:00:32

passed #197644
docker-alpine ci-build x86
build-x86

00:00:19

passed #197643
docker-alpine ci-build x86_64
build-x86_64

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