Let git ignore build executables
Let git ignore build executables

Acidburn0zzz/getdns,dkg/getdns,Acidburn0zzz/getdns,glenwiley/getdns,dkg/getdns,dkg/getdns,glenwiley/getdns,glenwiley/getdns,shane-kerr/getdns,dkg/getdns,smogali/getdns,huitema/getdns,huitema/getdns,Acidburn0zzz/getdns,shane-kerr/getdns,huitema/getdns,smogali/getdns,Acidburn0zzz/getdns,smogali/getdns,shane-kerr/getdns,shane-kerr/getdns,smogali/getdns,huitema/getdns,glenwiley/getdns