Fixes the following complaints:
src/network/core/address.cpp: In member function 'const sockaddr_storage* NetworkAddress::GetAddress()':
src/network/core/address.cpp:134:55: error: 'AI_ADDRCONFIG' was not declared in this scope
this->Resolve(this->address.ss_family, SOCK_STREAM, AI_ADDRCONFIG, nullptr, ResolveLoopProc);
Signed-off-by: Joe Stringer <joe@wand.net.nz>