fix compiler error

test=develop

Author: luotao1

python/requirements.txt

@@ -1,7 +1,7 @@
 requests==2.9.2
 numpy>=1.12,<=1.14 #TODO:change to ">=1.12" when numpy fix bug in 1.15 and higher version
 protobuf==3.1
-recordio>=0.1.0; sys_platform != 'win32'
+recordio>=0.1.0
 matplotlib==2.2.3 # TODO: let python3 paddlepaddle package use latest matplotlib
 rarfile
 scipy>=0.19.0