message: Fix: different name for backend_protos on r2.1 branch
  Test Plan: Tested locally
  Reviewers: #tensorflow, #framework_ip_review_-_any_oss_or_third-party_code_use_has_been_approved, jamesn, georgep, anthonyb
  Maniphest Tasks: T17458
diff: @@ -453,8 +453,8 @@ cc_library(
  ],
  linkstatic = 1,
  deps = [
  + ":backend_protos",
  ":flags",
  - ":xla_backend_protos",
  "//tensorflow/compiler/xla:util",
  "//tensorflow/compiler/xla:xla_headers_lib",
  "//tensorflow/core:core_cpu",
  @@ -712,9 +712,9 @@ cc_library(
  "kernels/datastream/exporters.cc",
  ],
  deps = [
  + ":backend_protos",
  ":infeed_utils",
  ":option_flag_cc_impl",
  - ":xla_backend_protos",
  "//tensorflow/compiler/plugin/poplar/tools:poplar_executable_data",
  "//tensorflow/compiler/tf2xla:common",
  "//tensorflow/compiler/tf2xla:tf2xla_util",
  