message: Update proxy-wasm host SHA for windows fixes.
diff: @@ -704,9 +704,9 @@ DEPENDENCY_REPOSITORIES_SPEC = dict(
  proxy_wasm_cpp_host = dict(
  project_name = "WebAssembly for Proxies (C++ host implementation)",
  project_url = "https://github.com/proxy-wasm/proxy-wasm-cpp-host",
  - # 2020-08-07
  - version = "c0fac1b988ca18dcc5208b295398863f82448541",
  - sha256 = "2cba66f2211ab025f83e281b85ed52cecce85a9a1ab29e18229c2a0a21c00994",
  + # 2020-08-20
  + version = "42c49d8d12b2a75b26eb182360235704fa27ca5d",
  + sha256 = "c7165aaa83809b04d9fa3fd33dafc48ab825509fbbaf1bcbccc2ec1af8d4c7a2",
  strip_prefix = "proxy-wasm-cpp-host-{version}",
  urls = ["https://github.com/proxy-wasm/proxy-wasm-cpp-host/archive/{version}.tar.gz"],
  use_category = ["dataplane"],
  