train: bump buildah to 1.11.2-2
train: bump buildah to 1.11.2-2

Release notes since last version in RDO:

https://github.com/containers/buildah/releases/tag/v1.11.0
https://github.com/containers/buildah/releases/tag/v1.11.1
https://github.com/containers/buildah/releases/tag/v1.11.2

Stabilization, bugfix and vendoring updates.

Change-Id: I83f804e2d8dd79b4472c30f36e8554e03e36c4ef

javierpena/rdoinfo,redhat-openstack/rdoinfo