message: build: fix http_api_protos dep in http_subscription_lib.
  This dependency needs to be explicit for the Google import.
diff: @@ -37,7 +37,10 @@ envoy_cc_library(
  envoy_cc_library(
  name = "http_subscription_lib",
  hdrs = ["http_subscription_impl.h"],
  - external_deps = ["envoy_base"],
  + external_deps = [
  + "envoy_base",
  + "http_api_protos",
  + ],
  deps = [
  "//include/envoy/config:subscription_interface",
  "//source/common/buffer:buffer_lib",
  