Fail to build the example by the tutorial in README.md.

[workingloong]

I execute ``./configure.shwith "Y, Y, n" and then fail to runbazel build build_pip_pkgafter using the image tensorflow/tensorflow:custom-op-ubuntu16.

ERROR: /temp/custom-op/tensorflow_zero_out/BUILD:10:1: //tensorflow_zero_out:python/ops/_zero_out_ops.so depends on @local_config_tf//:libtensorflow_framework in repository @local_config_tf which failed to fetch. no such package '@local_config_tf//': Traceback (most recent call last):
	File "/temp/custom-op/tf/tf_configure.bzl", line 181
		_symlink_genrule_for_dir(<5 more arguments>)
	File "/temp/custom-op/tf/tf_configure.bzl", line 148, in _symlink_genrule_for_dir
		_norm_path(src_dir)
	File "/temp/custom-op/tf/tf_configure.bzl", line 110, in _norm_path
		path[-(1)]
index out of range (index is -1, but sequence has 0 elements)