Add has_services annotation to api_proto_library. (#37)

Also bonus fix to eds.proto, it doesn't need the address.proto import.

api/BUILD

@@ -31,6 +31,7 @@ api_proto_library(
         ":health_check",
         ":tls_context",
     ],
+    has_services = 1,
 )
 
 api_proto_library(
@@ -41,6 +42,7 @@ api_proto_library(
         ":base",
         ":health_check",
     ],
+    has_services = 1,
 )
 
 api_proto_library(
@@ -50,6 +52,7 @@ api_proto_library(
         ":base",
         ":health_check",
     ],
+    has_services = 1,
 )
 
 api_proto_library(
@@ -60,10 +63,12 @@ api_proto_library(
         ":base",
         ":tls_context",
     ],
+    has_services = 1,
 )
 
 api_proto_library(
     name = "rds",
     srcs = ["rds.proto"],
     deps = [":base"],
+    has_services = 1,
 )

api/eds.proto

@@ -2,7 +2,6 @@ syntax = "proto3";
 
 package envoy.api.v2;
 
-import "api/address.proto";
 import "api/base.proto";
 import "api/health_check.proto";
 

bazel/api_build_system.bzl

@@ -1,6 +1,8 @@
 load("@protobuf_bzl//:protobuf.bzl", "cc_proto_library")
 
-def api_proto_library(name, srcs = [], deps = []):
+# TODO(htuch): has_services is currently ignored but will in future support
+# gRPC stub generation.
+def api_proto_library(name, srcs = [], deps = [], has_services = 0):
     cc_proto_library(
         name = name,
         srcs = srcs,