runtime: add geust memory dump

When guest panic, dump guest kernel memory to host filesystem.
And also includes:
- hypervisor config
- hypervisor version
- and state of sandbox

Fixes: #1012

Signed-off-by: bin liu <bin@hyper.sh>

src/runtime/virtcontainers/qemu_arch_base.go

@@ -133,6 +133,9 @@ type qemuArch interface {
 
 	// append vIOMMU device
 	appendIOMMU(devices []govmmQemu.Device) ([]govmmQemu.Device, error)
+
+	// append pvpanic device
+	appendPVPanicDevice(devices []govmmQemu.Device) ([]govmmQemu.Device, error)
 }
 
 type qemuArchBase struct {
@@ -789,3 +792,9 @@ func (q *qemuArchBase) appendIOMMU(devices []govmmQemu.Device) ([]govmmQemu.Devi
 		return devices, fmt.Errorf("Machine Type %s does not support vIOMMU", q.qemuMachine.Type)
 	}
 }
+
+// appendPVPanicDevice appends a pvpanic device
+func (q *qemuArchBase) appendPVPanicDevice(devices []govmmQemu.Device) ([]govmmQemu.Device, error) {
+	devices = append(devices, govmmQemu.PVPanicDevice{NoShutdown: true})
+	return devices, nil
+}