test: remove internal headers from addons

Backport-PR-URL: #16550
PR-URL: #7947
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: gibfahn

test/addons/openssl-binding/binding.cc

@@ -1,7 +1,4 @@
-#include "node.h"
-#include "../../../src/util.h"
-#include "../../../src/util-inl.h"
-
+#include <node.h>
 #include <assert.h>
 #include <openssl/rand.h>