Handle h_addr in a more libc independent way.

native_client_sdk/src/libraries/nacl_io/host_resolver.cc

Index: native_client_sdk/src/libraries/nacl_io/host_resolver.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/host_resolver.cc b/native_client_sdk/src/libraries/nacl_io/host_resolver.cc
index b0a3f243a67833422d756bf2ce7d89b30210f948..25b4f42185bbb7bbc46ed9100f0a61f0ca998295 100644
--- a/native_client_sdk/src/libraries/nacl_io/host_resolver.cc
+++ b/native_client_sdk/src/libraries/nacl_io/host_resolver.cc
@@ -196,6 +196,11 @@ struct hostent* HostResolver::gethostbyname(const char* name) {
   }
 
   freeaddrinfo(ai);
+
+  // Copy element zero of h_addr_list to h_addr as in some libc's h_addr may be
+  // a macro, but in others it may be a separate member.
+  hostent_.haddr = hostent_.h_addr_list[0];
+
   return &hostent_;
 }