cargo: Bump the kvm and vmm-sys-util crates

Since the kvm crates now depend on vmm-sys-util, the bump must be
atomic.
The kvm-bindings and ioctls 0.2.0 and 0.4.0 crates come with a few API
changes, one of them being the use of a kvm_ioctls specific error type.
Porting our code to that type makes for a fairly large diff stat.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

devices/src/ioapic.rs

@@ -13,14 +13,14 @@ use crate::BusDevice;
 use byteorder::{ByteOrder, LittleEndian};
 use kvm_bindings::kvm_msi;
 use kvm_ioctls::VmFd;
+use std::result;
 use std::sync::Arc;
-use std::{io, result};
 use vm_memory::GuestAddress;
 
 #[derive(Debug)]
 pub enum Error {
     /// Failed to send an interrupt.
-    InterruptFailed(io::Error),
+    InterruptFailed(kvm_ioctls::Error),
     /// Invalid destination mode.
     InvalidDestinationMode,
     /// Invalid trigger mode.