Update to gazelle 0.12.0 and run hack/update-bazel.sh

vendor/github.com/libopenstorage/openstorage/api/BUILD

@@ -7,12 +7,13 @@ go_library(
         "api.pb.go",
         "status.go",
     ],
+    importmap = "vendor/github.com/libopenstorage/openstorage/api",
     importpath = "github.com/libopenstorage/openstorage/api",
     visibility = ["//visibility:public"],
     deps = [
         "//vendor/github.com/golang/protobuf/proto:go_default_library",
-        "//vendor/github.com/golang/protobuf/ptypes/timestamp:go_default_library",
         "//vendor/github.com/mohae/deepcopy:go_default_library",
+        "@io_bazel_rules_go//proto/wkt:timestamp_go_proto",
     ],
 )
 

vendor/github.com/libopenstorage/openstorage/api/client/BUILD

@@ -6,6 +6,7 @@ go_library(
         "client.go",
         "request.go",
     ],
+    importmap = "vendor/github.com/libopenstorage/openstorage/api/client",
     importpath = "github.com/libopenstorage/openstorage/api/client",
     visibility = ["//visibility:public"],
 )

vendor/github.com/libopenstorage/openstorage/api/client/volume/BUILD

@@ -6,6 +6,7 @@ go_library(
         "client.go",
         "volume.go",
     ],
+    importmap = "vendor/github.com/libopenstorage/openstorage/api/client/volume",
     importpath = "github.com/libopenstorage/openstorage/api/client/volume",
     visibility = ["//visibility:public"],
     deps = [

vendor/github.com/libopenstorage/openstorage/api/spec/BUILD

@@ -3,6 +3,7 @@ load("@io_bazel_rules_go//go:def.bzl", "go_library")
 go_library(
     name = "go_default_library",
     srcs = ["spec_handler.go"],
+    importmap = "vendor/github.com/libopenstorage/openstorage/api/spec",
     importpath = "github.com/libopenstorage/openstorage/api/spec",
     visibility = ["//visibility:public"],
     deps = [