cloud-hypervisor: Add the architecture crates

Both crates are based on Firecracker commit 9cdb5b2.
They are ported to the new memory model and tests have been fixed
accordingly.

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

arch/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "arch"
+version = "0.1.0"
+authors = ["The Chromium OS Authors"]
+
+[dependencies]
+byteorder = "=1.2.1"
+kvm-bindings = "0.1"
+libc = ">=0.2.39"
+
+kvm-ioctls = { git = "https://github.com/rust-vmm/kvm-ioctls" }
+
+arch_gen = { path = "../arch_gen" }
+
+[dependencies.vm-memory]
+git = "https://github.com/rust-vmm/vm-memory"
+features = ["backend-mmap"]
+
+[dev-dependencies]
+rand = ">=0.5.5"