Changed the logic of avoided path in CFG.
Changed the logic of avoided path in CFG.

xurantju/angr,iamahuman/angr,schieb/angr,axt/angr,chubbymaggie/angr,zhuyue1314/angr,axt/angr,chubbymaggie/angr,axt/angr,fjferrer/angr,fjferrer/angr,avain/angr,tyb0807/angr,angr/angr,zhuyue1314/angr,chubbymaggie/angr,angr/angr,tyb0807/angr,avain/angr,lowks/angr,GuardianRG/angr,schieb/angr,haylesr/angr,lowks/angr,GuardianRG/angr,angr/angr,iamahuman/angr,f-prettyland/angr,mingderwang/angr,terry2012/angr,haylesr/angr,mingderwang/angr,iamahuman/angr,cureHsu/angr,xurantju/angr,terry2012/angr,f-prettyland/angr,f-prettyland/angr,cureHsu/angr,schieb/angr,tyb0807/angr