build, vmm: Update to latest kvm-ioctls

The ch branch has been rebased to incorporate the latest upstream code
requiring a small change to the unit tests.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

vmm/src/vm.rs

@@ -1426,7 +1426,7 @@ pub fn test_vm() {
             VcpuExit::Watchdog => {}
             VcpuExit::S390Tsch => {}
             VcpuExit::Epr => {}
-            VcpuExit::SystemEvent => {}
+            VcpuExit::SystemEvent(_, _) => {}
             VcpuExit::S390Stsi => {}
             VcpuExit::IoapicEoi(_vector) => {}
             VcpuExit::Hyperv => {}