update aws-sdk to support new region

vendor/github.com/aws/aws-sdk-go/internal/sdkio/BUILD

@@ -0,0 +1,26 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "io_go1.6.go",
+        "io_go1.7.go",
+    ],
+    importmap = "k8s.io/kubernetes/vendor/github.com/aws/aws-sdk-go/internal/sdkio",
+    importpath = "github.com/aws/aws-sdk-go/internal/sdkio",
+    visibility = ["//vendor/github.com/aws/aws-sdk-go:__subpackages__"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)