Added a filtering function to allow user decide whether to trace into a call or not.
Added a filtering function to allow user decide whether to trace into a call or not.

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