community/phodav: add avahi as dependency

The avahi-daemon is needed for spice-webdavd to function
8 jobs for !26444 with spice-webdavd-avahi-dep in 2 minutes and 7 seconds (queued for 4 seconds)
detached
Status Job ID Name Coverage
  Lint
passed lint #513468
docker-alpine x86_64

00:00:18

 
  Build
passed build-aarch64 #513473
docker-alpine ci-build aarch64

00:01:48

passed build-armhf #513475
docker-alpine ci-build armhf

00:01:29

passed build-armv7 #513474
docker-alpine ci-build armv7

00:01:13

passed build-ppc64le #513472
docker-alpine ci-build ppc64le

00:01:19

passed build-s390x #513471
docker-alpine ci-build s390x

00:00:38

passed build-x86 #513470
docker-alpine ci-build x86

00:00:38

passed build-x86_64 #513469
docker-alpine ci-build x86_64

00:00:34