routing pb (#313)

modules/routing/proto/BUILD

+package(default_visibility = ["//visibility:public"])
+
+load("@org_pubref_rules_protobuf//cpp:rules.bzl", "cc_proto_library")
+load("@org_pubref_rules_protobuf//python:rules.bzl", "py_proto_compile")
+
+cc_proto_library(
+    name = "routing_proto",
+    protos = [
+        "routing.proto",
+        "topo_graph.proto",
+    ],
+    deps = [
+        "//modules/common/proto:common_proto",
+        "//modules/map/proto:map_proto",
+    ],
+)
+
+py_proto_compile(
+    name = "routing_proto_pylib",
+    protos = [
+        "routing.proto",
+        "topo_graph.proto",
+    ],
+    deps = [
+        "//modules/common/proto:common_proto_pylib",
+        "//modules/map/proto:map_proto_pylib",
+    ],
+)