Initialize the builder's annotations from OCI data
Initialize the builder's annotations from OCI data

If we're building on an OCI image, initialize the Builder object's
annotations using the annotations from the source image.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

Closes: #116
Approved by: rhatdan

nalind/buildah-1,projectatomic/buildah,nalind/buildah,rhatdan/buildah,projectatomic/buildah,rhatdan/buildah,ipbabble/buildah,nalind/buildah-1,nalind/buildah,projectatomic/buildah,rhatdan/buildah,ipbabble/buildah,nalind/buildah-1,TomSweeneyRedHat/buildah,TomSweeneyRedHat/buildah,TomSweeneyRedHat/buildah