buildenv/1.2.x/centos-ermine: backport cleaning step in bzip2 from 1.3.x/centos-ermine.
buildenv/1.2.x/centos-ermine: backport cleaning step in bzip2 from 1.3.x/centos-ermine.

ccpgames/mumble-releng,ccpgames/mumble-releng