test: skip null-buffer-neuter on node-chakracore

null-buffer-neuter tests GC behavior and doesn't work on node-chakracore.

PR-URL: #52
Reviewed-By: Sandeep Agarwal <Agarwal.Sandeep@microsoft.com>

test/addons/null-buffer-neuter/test.js

@@ -1,7 +1,14 @@
 'use strict';
 // Flags: --expose-gc
 
-require('../../common');
+const common = require('../../common');
 var binding = require('./build/Release/binding');
 
+if (common.isChakraEngine) {
+  console.log(`1..0 # Skipped: This test is disabled for chakra engine
+  because it depends on v8 GC behavior. Chakra GC may find reference-like
+  data on native stack and may not do the GC as expected.`);
+  return;
+}
+
 binding.run();