Add glide.yaml and vendor deps

vendor/k8s.io/kubernetes/cmd/libs/go2idl/openapi-gen/BUILD

@@ -0,0 +1,22 @@
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_binary",
+    "go_library",
+    "go_test",
+    "cgo_library",
+)
+
+go_binary(
+    name = "openapi-gen",
+    srcs = ["main.go"],
+    tags = ["automanaged"],
+    deps = [
+        "//cmd/libs/go2idl/openapi-gen/generators:go_default_library",
+        "//vendor:github.com/golang/glog",
+        "//vendor:k8s.io/gengo/args",
+    ],
+)