Makefile.am: update dependencies for wdns/rrclass_to_str.c, wdns/rrtype_to_str.c
Makefile.am: update dependencies for wdns/rrclass_to_str.c, wdns/rrtype_to_str.c

hstern/wdns,d4s/wdns,d4s/wdns,hstern/wdns,hstern/wdns,d4s/wdns,hstern/wdns