message: Use envoy_proto_library macro for hot_restart.proto
diff: @@ -4,6 +4,7 @@ load(
  "//bazel:envoy_build_system.bzl",
  "envoy_cc_library",
  "envoy_package",
  + "envoy_proto_library",
  "envoy_select_hot_restart",
  )
  @@ -107,13 +108,8 @@ envoy_cc_library(
  ],
  )
  -cc_proto_library(
  - name = "hot_restart_cc",
  - deps = [":hot_restart_proto"],
  -)
  -
  -proto_library(
  - name = "hot_restart_proto",
  +envoy_proto_library(
  + name = "hot_restart",
  srcs = ["hot_restart.proto"],
  )
  