[CentOS] build c7 packages for i686 using mock

[Gordon Messmer]

On 01/30/2015 02:19 AM, Robin Lee wrote:
> Do note the 32bit packages are unofficial and unsupported. RedHat does not
> support 32bit in EL7.

Right, but the CentOS project itself produces multi-arch libraries, so I 
guess what I'm really asking is, "how?"