build-and-provide-package: rework arch specific build stuff
build-and-provide-package: rework arch specific build stuff

Don't build i386 with "-B" but use the "-b" as well.
Also don't care about arch all vs. arch specific packages during
file removal any longer.

This is supposed to fix configuration matrix builds in Jenkins,
where we're building the package for multiple architectures.

cclausen/jenkins-debian-glue,cclausen/jenkins-debian-glue,linuxmaniac/jenkins-debian-glue,tanglu-org/jenkins-tanglu-buildkit,vorlock/jenkins-debian-glue,jbfavre/jenkins-debian-glue,tonin/jenkins-debian-glue,zeha/jenkins-debian-glue,kartikm/jenkins-debian-glue,jbfavre/jenkins-debian-glue,mika/jenkins-debian-glue,wikimedia/operations-debs-jenkins-debian-glue,tonin/jenkins-debian-glue,vorlock/jenkins-debian-glue,linuxmaniac/jenkins-debian-glue,kartikm/jenkins-debian-glue,n054/jenkins-debian-glue,wikimedia/operations-debs-jenkins-debian-glue,bmiklautz/jenkins-debian-glue,hetznerZA/jenkins-debian-glue,tanglu-org/jenkins-tanglu-buildkit,n054/jenkins-debian-glue,bmiklautz/jenkins-debian-glue,hashar/jenkins-debian-glue,hashar/jenkins-debian-glue,webtrekk-kane/jenkins-debian-glue,mika/jenkins-debian-glue,zeha/jenkins-debian-glue,hetznerZA/jenkins-debian-glue,webtrekk-kane/jenkins-debian-glue,tanglu-org/jenkins-tanglu-buildkit