UBUNTU: SAUCE: apparmor: Fix new to old label comparison for domain transitions

UBUNTU: SAUCE: apparmor: Fix new to old label comparison for domain transitions

For the purposes of inherit we should be treating a profile/label transition
to its replacement as if the replacement is the profile/label.

So make the comparison based off of the label proxy, not the label itself.

BugLink: http://bugs.launchpad.net/bugs/1615880
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>