xen: security and bugfix update (important)

XEN was updated to fix security issues and bugs.

Security issues fixed:

• bnc#897657 - CVE-2014-7188: XSA-108 Improper MSR range used for x2APIC
  emulation
• bnc#895802 - CVE-2014-7156: XSA-106: Missing privilege level checks in
  x86 emulation of software interrupts
• bnc#895799 - CVE-2014-7155: XSA-105: Missing privilege level checks in
  x86 HLT, LGDT, LIDT, and LMSW emulation
• bnc#895798 - CVE-2014-7154: XSA-104: Race condition in
  HVMOP_track_dirty_vram
• bnc#864801 - CVE-2013-4540: qemu: zaurus: buffer overrun on invalid
  state load
• bnc#875668 - CVE-2014-3124: XSA-92: HVMOP_set_mem_type allows invalid
  P2M entries to be created
• bnc#878841 - CVE-2014-3967, CVE-2014-3968: XSA-96: Xen: Vulnerabilities
  in HVM MSI injection
• bnc#880751 - CVE-2014-4021: XSA-100: Hypervisor heap contents leaked to
  guests
• bnc#842006 - CVE-2013-4344: XSA-65: xen: qemu SCSI REPORT LUNS buffer
  overflow

Other bugs fixed:

• bnc#896023 - Adjust xentop column layout
• bnc#820873 - The "long" option doesn’t work with "xl list"
• bnc#882127 - Xen kernel panics on booting SLES12 Beta 8
• bnc#865682 - Local attach support for PHY backends using scripts
• bnc#798770 - Improve multipath support for npiv devices