Add build_raw_data.py

fluid/PaddleNLP/text_classification/async_executor/data_generator/build_raw_data.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 """
-Build lego raw data
+Build raw data
 """
 from __future__ import print_function
 import sys