message: Use lower targets for the XLA headers only build
  The :jit target is the one used by the main body of TF to
  link in XLA.  If we are to use it to bring in Poplar too,
  then poplar cannot indirectly depend upon it
diff: @@ -25,7 +25,10 @@ cc_header_only_library(
  name = "xla_jit_headers_lib",
  visibility = ["//visibility:public"],
  deps = [
  - ":jit",
  + ":xla_cpu_device",
  + ":xla_cpu_jit",
  + ":xla_gpu_device",
  + ":xla_gpu_jit",
  ],
  )
  