fix fairseq bug

app.py

@@ -25,7 +25,7 @@ os.system('mv -n mRASP2/* ./')
 os.system("rm -rf mRASP2")
 os.system("pip install -r requirements.txt")
 os.system("git clone https://github.com/pytorch/fairseq")
-os.system("pip install --editable ./fairseq/")
+os.system("cd fairseq; pip install ./; cd ..")
 
 model_name = "6e6d_no_mono.pt"
 os.system("wget https://lf3-nlp-opensource.bytetos.com/obj/nlp-opensource/acl2021/mrasp2/" + model_name)