
Since DIB creates a chroot but doesn't actually chroot in an extra-data script, look for /etc/redhat-release relative to the temporary chroot base path. Also given that the centos element leaves DIB_RELEASE exported as am empty string in the calling environment rather than unset, place it first in the conditional list. Change-Id: I0a51f88ff5ea71b6aa6e6406b656cefb0e135e88