Cargo: Update dependencies for the KVM serialization work

We need the project to rely on kvm-bindings and kvm-ioctls branches
which include the serde derive to be able to serialize and deserialize
some KVM structures.

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

vfio/Cargo.toml

@@ -7,8 +7,8 @@ authors = ["The Cloud Hypervisor Authors"]
 arc-swap = ">=0.4.4"
 byteorder = "1.3.4"
 devices = { path = "../devices" }
-kvm-bindings = "0.2.0"
-kvm-ioctls = "0.5.0"
+kvm-bindings = { git = "https://github.com/cloud-hypervisor/kvm-bindings", branch = "ch" }
+kvm-ioctls = { git = "https://github.com/cloud-hypervisor/kvm-ioctls", branch = "ch" }
 libc = "0.2.68"
 log = "0.4.8"
 pci = { path = "../pci" }