When we get an EXTINT exit, the guest RIP already points to the
instruction after the one that sent it into HLT state. Moving
the RIP based on stale insn_len caused spurious L2 crashes.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <554729D3.5060005@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>