TensorFlow: merge changes from internal

Change 110044026
	Wrap comment in build_pip_package.sh

Base CL: 110044081

tensorflow/g3doc/tutorials/mnist/beginners/index.md

@@ -43,7 +43,7 @@ automatically. You can either download
 and import it as below, or simply copy and paste it in.
 
 ```python
-import tensorflow.examples.tutorials.mnist.input_data
+from tensorflow.examples.tutorials.mnist import input_data
 mnist = input_data.read_data_sets("MNIST_data/", one_hot=True)
 ```
 

tensorflow/tools/pip_package/build_pip_package.sh

@@ -39,10 +39,14 @@ function main() {
   cp tensorflow/tools/pip_package/MANIFEST.in ${TMPDIR}
   cp tensorflow/tools/pip_package/README ${TMPDIR}
   cp tensorflow/tools/pip_package/setup.py ${TMPDIR}
+
+  # Before we leave the top-level directory, make sure we know how to
+  # call python.
+  source tools/python_bin_path.sh
+
   pushd ${TMPDIR}
   rm -f MANIFEST
   echo $(date) : "=== Building wheel"
-  source tools/python_bin_path.sh
   ${PYTHON_BIN_PATH:-python} setup.py bdist_wheel >/dev/null
   mkdir -p ${DEST}
   cp dist/* ${DEST}