Comment 3 for bug 1476726

They are already mixed, and that is exactly the problem:
http://172.18.160.74/osci/mos/7.0/cluster/base/trusty/pool/main/m/mysql-wsrep-5.6/

You might also check the link I provided. It shows that both mysql-client-5.6 also installs mysql-wsrep-common-5.6 are build from the same source package.