test: fix test-repl-tab-complete.js for V8 4.5

The list of Array properties needed to be updated to match the new ones added
in V8 4.5.

PR-URL: #2509
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

Author: ofrobots

test/parallel/test-repl-tab-complete.js

@@ -265,9 +265,13 @@ var array_elements = [ [
   'ary.valueOf',
   '',
   'ary.concat',
+  'ary.copyWithin',
   'ary.entries',
   'ary.every',
+  'ary.fill',
   'ary.filter',
+  'ary.find',
+  'ary.findIndex',
   'ary.forEach',
   'ary.indexOf',
   'ary.join',