Update WORKSPACE / BUILD to work with bazel at HEAD.

Uses external rules_go github repository.

vendor/github.com/laramiel/BUILD

@@ -1,7 +1,7 @@
-load("@bazel_tools//tools/build_rules/go:def.bzl", "go_library")
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
 
 go_library(
     name = "bare",
-    srcs = [ "bazel-example-golang-bare/bare.go" ],
+    srcs = ["bazel-example-golang-bare/bare.go"],
     visibility = ["//visibility:public"],
 )