Updated openstack/openstack
Project: openstack-dev/devstack  94143349723860105ef4fd1e3bbdda9a0ef96726

Add architecture to tempest configuration

Cirros may be also built in other architectures other than
x86_64 (ex: ppc). This option should be broader,
so adding a new variable CIRROS_ARCH

Change-Id: I9fcd3f15e04bb581cf647ad49172c7d698e8e574