BUILD: makefile: Enable getaddrinfo() on OS/X

Enable getaddrinfo() on OS/X.
diff --git a/Makefile b/Makefile
index db9bbe7..2fb05c7 100644
--- a/Makefile
+++ b/Makefile
@@ -382,7 +382,8 @@
 # Mac OS/X
 ifeq ($(TARGET),osx)
   set_target_defaults = $(call default_opts, \
-    USE_POLL USE_TPROXY USE_LIBCRYPT USE_THREAD USE_CPU_AFFINITY USE_KQUEUE)
+    USE_POLL USE_TPROXY USE_LIBCRYPT USE_THREAD USE_CPU_AFFINITY USE_KQUEUE   \
+    USE_GETADDRINFO)
   EXPORT_SYMBOL  = -export_dynamic
 endif