Polish code

test=develop

paddle/scripts/paddle_build.sh

@@ -371,7 +371,7 @@ function run_test() {
     Running unit tests ...
     ========================================
 EOF
-        # ctest --output-on-failure
+        ctest --output-on-failure
         # make install should also be test when unittest
         make install -j `nproc`
         pip install ${INSTALL_PREFIX:-/paddle/build}/opt/paddle/share/wheels/*.whl

python/paddle/fluid/layers/nn.py

@@ -7504,6 +7504,7 @@ def hash(input, hash_size, num_hash=1, name=None):
         input (Variable): The input variable which is a one-hot word.
         hash_size (int): The space size for hash algorithm.
         num_hash (int): The times of hash, default 1.
+        name (str, default None): The name of this layer.
      Returns:
         Variable: The hash result variable which is a LoDTensor.
      Examples: