Update rust-vmm/vmm-sys-util and use caret reqs

vmm-sys-util 0.9.0 -> 0.11.0

See https://github.com/rust-vmm/community/issues/136

Signed-off-by: Patrick Roy <roypat@amazon.co.uk>

Cargo.lock

@@ -24,9 +24,9 @@ dependencies = [
 
 [[package]]
 name = "vmm-sys-util"
-version = "0.9.0"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "733537bded03aaa93543f785ae997727b30d1d9f4a03b7861d23290474242e11"
+checksum = "cc06a16ee8ebf0d9269aed304030b0d20a866b8b3dd3d4ce532596ac567a0d24"
 dependencies = [
  "bitflags",
  "libc",