title: Error with swig_import_helper and PyModule_Create2 when building tensorflow-serving with bazel
body: <p>I'm trying to install tensorflow-serving using bazel, and when I run </p>
  
  <pre><code>bazel build tensorflow_serving/... 
  </code></pre>
  
  <p>to build the source tree, I get this error:</p>
  
  <pre><code>ERROR: /home/saad/.cache/bazel/_bazel_saad/e37842e738e0e762fe833f8c0caa8761/external/org_tensorflow/tensorflow/contrib/session_bundle/example/BUILD:38:1: Executing genrule @org_tensorflow//tensorflow/contrib/session_bundle/example:half_plus_two failed: bash failed: error executing command /bin/bash -c ... (remaining 1 argument(s) skipped): com.google.devtools.build.lib.shell.BadExitStatusException: Process exited with status 1.
  Traceback (most recent call last):
    File "/home/saad/.cache/bazel/_bazel_saad/e37842e738e0e762fe833f8c0caa8761/execroot/serving/bazel-out/host/bin/external/org_tensorflow/tensorflow/contrib/session_bundle/example/export_half_plus_two.runfiles/tf_serving/../org_tensorflow/tensorflow/contrib/session_bundle/example/export_half_plus_two.py", line 32, in &lt;module&gt;
      import tensorflow as tf
    File "/home/saad/.cache/bazel/_bazel_saad/e37842e738e0e762fe833f8c0caa8761/execroot/serving/bazel-out/host/bin/external/org_tensorflow/tensorflow/contrib/session_bundle/example/export_half_plus_two.runfiles/org_tensorflow/tensorflow/__init__.py", line 23, in &lt;module&gt;
      from tensorflow.python import *
    File "/home/saad/.cache/bazel/_bazel_saad/e37842e738e0e762fe833f8c0caa8761/execroot/serving/bazel-out/host/bin/external/org_tensorflow/tensorflow/contrib/session_bundle/example/export_half_plus_two.runfiles/org_tensorflow/tensorflow/python/__init__.py", line 48, in &lt;module&gt;
      from tensorflow.python import pywrap_tensorflow
    File "/home/saad/.cache/bazel/_bazel_saad/e37842e738e0e762fe833f8c0caa8761/execroot/serving/bazel-out/host/bin/external/org_tensorflow/tensorflow/contrib/session_bundle/example/export_half_plus_two.runfiles/org_tensorflow/tensorflow/python/pywrap_tensorflow.py", line 28, in &lt;module&gt;
      _pywrap_tensorflow = swig_import_helper()
    File "/home/saad/.cache/bazel/_bazel_saad/e37842e738e0e762fe833f8c0caa8761/execroot/serving/bazel-out/host/bin/external/org_tensorflow/tensorflow/contrib/session_bundle/example/export_half_plus_two.runfiles/org_tensorflow/tensorflow/python/pywrap_tensorflow.py", line 24, in swig_import_helper
      _mod = imp.load_module('_pywrap_tensorflow', fp, pathname, description)
  ImportError: /home/saad/.cache/bazel/_bazel_saad/e37842e738e0e762fe833f8c0caa8761/execroot/serving/bazel-out/host/bin/external/org_tensorflow/tensorflow/contrib/session_bundle/example/export_half_plus_two.runfiles/org_tensorflow/tensorflow/python/_pywrap_tensorflow.so: undefined symbol: PyModule_Create2
  </code></pre>
  
  <p>What do I do?</p>
  
  <p>I'm running python 3.5, gcc/g++ 4.9, CUDA 8.0, have swig installed, and am trying to build on Ubuntu Mate 16.04 with a GTX 1080.</p>
  
  <p>Thanks!</p>