resolv: make internal symbols static/hidden

Change-Id: I988b83613e6252c0cc961555e81c10f856a38b37
diff --git a/libc/netbsd/resolv/res_data.c b/libc/netbsd/resolv/res_data.c
index e60ecfd..014c99b 100644
--- a/libc/netbsd/resolv/res_data.c
+++ b/libc/netbsd/resolv/res_data.c
@@ -46,6 +46,7 @@
 #include <unistd.h>
 
 
+__LIBC_HIDDEN__
 const char * const _res_opcodes[] = {
 	"QUERY",
 	"IQUERY",
@@ -82,7 +83,7 @@
 int  res_ourserver_p(const res_state, const struct sockaddr *);
 
 #ifdef ANDROID_CHANGES
-int res_need_init() {
+static int res_need_init() {
 	return ((_nres.options & RES_INIT) == 0U) || res_get_dns_changed();
 }
 #else