message: Expose TFE_DeleteContext in pywrap_tensorflow.
diff: @@ -18,6 +18,7 @@ limitations under the License.
  %rename("%s") TFE_Py_RegisterExceptionClass;
  %rename("%s") TFE_Py_NumpyToTensorHandle;
  %rename("%s") TFE_NewContext;
  +%rename("%s") TFE_DeleteContext;
  %rename("%s") TFE_ContextListDevices;
  %rename("%s") TFE_TensorHandleDataType;
  %rename("%s") TFE_TensorHandleNumDims;
  