message: Set INCLUDE_DIRECTORIES so libcurl can find local urlapi.h
  Fixes
diff: @@ -75,6 +75,7 @@ envoy_cmake_external(
  "CURL_HIDDEN_SYMBOLS": "off",
  "CMAKE_USE_LIBSSH2": "off",
  "CMAKE_INSTALL_LIBDIR": "lib",
  + "INCLUDE_DIRECTORIES": "include/curl",
  },
  lib_source = "@com_github_curl//:all",
  static_libraries = select({
  