Use TEST_TMPDIR for writing temporary files if it's set.
Use TEST_TMPDIR for writing temporary files if it's set.

Bazel expects all tests to do this.

google/protobuf,google/protobuf,Livefyre/protobuf,Livefyre/protobuf,Livefyre/protobuf,Livefyre/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf,Livefyre/protobuf,google/protobuf,google/protobuf,google/protobuf,google/protobuf