message: cargo: update micro_http crate
  Thus to fix a problem that http PUT body is dropped
  when using hyper to send http request.
diff: @@ -920,9 +920,10 @@ checksum = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
  [[package]]
  name = "micro_http"
  version = "0.2.0"
  -source = "git+https://github.com/cloud-hypervisor/micro-http.git#af72318b755620f9c1b99b319bc2e4e942b91b2f"
  +source = "git+https://github.com/cloud-hypervisor/micro-http.git?branch=master#f4405cb5afb092e86204c26d589e8c9448721bf0"
  dependencies = [
  - "epoll",
  + "libc",
  + "vmm-sys-util 0.9.0",
  ]
  [[package]]
  @@ -2144,6 +2145,16 @@ dependencies = [
  "libc",
  ]
  +[[package]]
  +name = "vmm-sys-util"
  +version = "0.9.0"
  +source = "registry+https://github.com/rust-lang/crates.io-index"
  +checksum = "733537bded03aaa93543f785ae997727b30d1d9f4a03b7861d23290474242e11"
  +dependencies = [
  + "bitflags",
  + "libc",
  +]
  +
  [[package]]
  name = "void"
  version = "1.0.2"
  