Implement symbol @@hasInstance for ES6 instanceof support.

test/test262/test262.status

 # Copyright 2011 the V8 project authors. All rights reserved.
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@@ skipping 238 matching lines @@
 
   # https://code.google.com/p/v8/issues/detail?id=4360
   'intl402/Collator/10.1.1_1': [FAIL],
   'intl402/DateTimeFormat/12.1.1_1': [FAIL],
   'intl402/NumberFormat/11.1.1_1': [FAIL],
 
   # https://code.google.com/p/v8/issues/detail?id=4361
   'intl402/Collator/10.1.1_a': [FAIL],
 
   # https://code.google.com/p/v8/issues/detail?id=4447
-  'built-ins/Function/prototype/Symbol.hasInstance/*': [SKIP],
-  'built-ins/Symbol/hasInstance/prop-desc': [FAIL],
   'language/expressions/instanceof/prototype-getter-with-object-throws': [FAIL],
   'language/expressions/instanceof/prototype-getter-with-object': [FAIL],
   'language/expressions/instanceof/primitive-prototype-with-object': [FAIL],
   'language/expressions/instanceof/symbol-hasinstance-get-err': [FAIL],
   'language/expressions/instanceof/symbol-hasinstance-invocation': [FAIL],
   'language/expressions/instanceof/symbol-hasinstance-to-boolean': [FAIL],
 
   # https://code.google.com/p/v8/issues/detail?id=4476
   'built-ins/String/prototype/toLocaleLowerCase/special_casing_conditional': [FAIL],
   'built-ins/String/prototype/toLocaleLowerCase/supplementary_plane': [FAIL],
@@ skipping 348 matching lines @@
   'built-ins/decodeURIComponent/S15.1.3.2_A1.12_T2': [SKIP],
   'built-ins/decodeURIComponent/S15.1.3.2_A1.12_T3': [SKIP],
   'intl402/9.2.2': [SKIP],
   'language/statements/let/fn-name-arrow': [SKIP],
   'language/statements/let/fn-name-cover': [SKIP],
   'language/statements/let/fn-name-fn': [SKIP],
   'language/statements/let/fn-name-gen': [SKIP],
 }],  # ignition == True and (arch == arm or arch == arm64)
 
 ]