Windows Bazel Build: Cut dependency on broken targets

In e8aefd21, a dependency:

//tensorflow/tools/pip_package:build_pip_package
//tensorflow/tools/pip_package:simple_console_for_windows
//tensorflow/python/debug:debug_pip
//tensorflow/python/debug:debug_examples
//tensorflow/python/debug:debug_mnist
//tensorflow/examples/tutorials/mnist:input_data
//tensorflow/contrib/learn/python/learn/datasets:datasets
//tensorflow/contrib/framework:framework_py
//tensorflow/contrib/framework:python/ops/_variable_ops.so

was introduced.

Cut this dependency by excluding :debug_examples on Windows