fix scoreboard build and SIGSEVG

[nanfengnan1]

start trace debug macro and will coredump, when executes show tcp scoreboard trace command .

[fcoras]

This is only a mirror, could you push your patch to gerrit.fd.io?

[dwallacelf]

Thank you so much for your interest! VPP takes patches at https://gerrit.fd.io/

git clone https://gerrit.fd.io/r/vpp

Using git review to contribute patches is recommended