community/mpd: disable on s390x

s390x does not have pipewire, I don't think it is worth adding a case
distinction for s390x presently to build mpd without pipewire on it.
8 jobs for !26445 with mpd-0.23 in 18 minutes and 12 seconds (queued for 5 seconds)
latest detached
Status Job ID Name Coverage
  Lint
passed lint #513260
docker-alpine x86_64

00:00:20

 
  Build
passed build-aarch64 #513265
docker-alpine ci-build aarch64

00:03:58

passed build-armhf #513267
docker-alpine ci-build armhf

00:03:11

passed build-armv7 #513266
docker-alpine ci-build armv7

00:04:16

passed build-ppc64le #513264
docker-alpine ci-build ppc64le

00:02:47

passed build-s390x #513263
docker-alpine ci-build s390x

00:00:52

passed build-x86 #513262
docker-alpine ci-build x86

00:01:29

passed build-x86_64 #513261
docker-alpine ci-build x86_64

00:01:15