Add StorageOS volume plugin

vendor/github.com/storageos/go-api/BUILD

@@ -0,0 +1,47 @@
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "client.go",
+        "client_unix.go",
+        "controller.go",
+        "event.go",
+        "namespace.go",
+        "pool.go",
+        "rule.go",
+        "server_version.go",
+        "template.go",
+        "util.go",
+        "validation.go",
+        "volume.go",
+    ],
+    tags = ["automanaged"],
+    deps = [
+        "//vendor/github.com/gorilla/websocket:go_default_library",
+        "//vendor/github.com/storageos/go-api/types:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [
+        ":package-srcs",
+        "//vendor/github.com/storageos/go-api/types:all-srcs",
+    ],
+    tags = ["automanaged"],
+)