Bug #26664 test suite times out on OS X 64bit

- Make the two "my_net_set*" function only visible when included
   from my_global.h


include/mysql_com.h:
  Make the two "my_net_set*" functions only
  visible when included from my_global.h

include/mysql_com.h

@@ -345,8 +345,10 @@ my_bool	net_write_command(NET *net,unsigned char command,
 int	net_real_write(NET *net,const char *packet,unsigned long len);
 unsigned long my_net_read(NET *net);
 
+#ifdef _global_h
 void my_net_set_write_timeout(NET *net, uint timeout);
 void my_net_set_read_timeout(NET *net, uint timeout);
+#endif
 
 /*
   The following function is not meant for normal usage