[Crash-utility] xencrash for xen 3.1

Hi, Since some structures in the xen 3.1 are changed from the xen 3.0.x, xencrash fails to open session with a vmcore taken under the xen 3.1 (ex. RHEL5.1). The attached patch fixes this problem. xencrash supports a vmcore taken under the xen 3.1 in addition to a vmcore taken under the xen 3.0.x. This patch is for crash-4.0-4.5. Thanks. -- Itsuro ODA <oda(a)valinux.co.jp&gt;