Start bazel support for protobuf models and p4runtime build

Change-Id: Ib3beb70c1b401854444b106b4af3723cd40635e4
diff --git a/WORKSPACE b/WORKSPACE
index e86cb0d..1a47662 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -1,4 +1,6 @@
 load("//tools/build/bazel:generate_workspace.bzl", "generated_maven_jars")
+load("//tools/build/bazel:p4lang_workspace.bzl", "generate_p4lang")
 generated_maven_jars()
+generate_p4lang()
 
 ONOS_VERSION = '1.14.0-SNAPSHOT'