Confine Hostboot base image and headers to 512K
Confine Hostboot base image and headers to 512K

Change-Id: I075ef23a61457b0b450edbbf8a7b0e5baa21753e
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/3009
Tested-by: Jenkins Server
Reviewed-by: ADAM R. MUHLE <58a109410212ec589742bb249ae57e4c913a0b41@us.ibm.com>
Reviewed-by: A. Patrick Williams III <c87e37b1a4035affd737b461af89fb722d635f4d@us.ibm.com>

open-power/hostboot,alvintpwang/hostboot,Over-enthusiastic/hostboot,csmart/hostboot,open-power/hostboot,csmart/hostboot,alvintpwang/hostboot,csmart/hostboot,csmart/hostboot,Over-enthusiastic/hostboot,open-power/hostboot,csmart/hostboot,alvintpwang/hostboot,open-power/hostboot,Over-enthusiastic/hostboot,alvintpwang/hostboot,open-power/hostboot,alvintpwang/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot