Add make target to build coverage data from tests.
Add make target to build coverage data from tests.

dotse/dnscheck,NZRS/dnscheck,NZRS/dnscheck,NZRS/dnscheck,dotse/dnscheck,dotse/dnscheck,dotse/dnscheck,dotse/dnscheck,NZRS/dnscheck,NZRS/dnscheck,dotse/dnscheck,NZRS/dnscheck