[Interpreter] Adds support for const/let variables to interpreter.

test/test262/test262.status

Index: test/test262/test262.status
diff --git a/test/test262/test262.status b/test/test262/test262.status
index a0b72122bade46ab5ed71fa086235b9692ca0748..3cbb039fbc620b41e93c05ecf431f366f6ddaab7 100644
--- a/test/test262/test262.status
+++ b/test/test262/test262.status
@@ -540,7 +540,6 @@
   'language/expressions/object/prop-def-id-eval-error-2': [SKIP],
   'language/expressions/yield/*': [SKIP],
   'language/statements/class/*': [SKIP],
-  'language/statements/const/*': [SKIP],
   'language/statements/generators/*': [SKIP],
   'language/statements/with/*': [SKIP],
 
@@ -580,7 +579,6 @@
   'language/computed-property-names/object/method/super': [SKIP],
   'language/default-parameters/class-definitions': [SKIP],
   'language/default-parameters/generators': [SKIP],
-  'language/default-parameters/param-ref-uninitialized': [SKIP],
   'language/eval-code/10.4.2-1-4': [SKIP],
   'language/expressions/delete/11.4.1-4.a-5': [SKIP],
   'language/expressions/delete/11.4.1-4.a-6': [SKIP],
@@ -591,8 +589,6 @@
   'language/expressions/tagged-template/call-expression-context-no-strict': [SKIP],
   'language/expressions/tagged-template/call-expression-context-strict': [SKIP],
   'language/expressions/template-literal/evaluation-order': [SKIP],
-  'language/statements/for-in/const-bound-names-fordecl-tdz-for-in': [SKIP],
-  'language/statements/for-in/let-bound-names-fordecl-tdz-for-in': [SKIP],
   'language/statements/for-of/body-dstr-assign': [SKIP],
   'language/statements/for-of/break': [SKIP],
   'language/statements/for-of/break-from-catch': [SKIP],
@@ -602,7 +598,6 @@
   'language/statements/for-of/break-label-from-catch': [SKIP],
   'language/statements/for-of/break-label-from-finally': [SKIP],
   'language/statements/for-of/break-label-from-try': [SKIP],
-  'language/statements/for-of/const-bound-names-fordecl-tdz-for-of': [SKIP],
   'language/statements/for-of/continue': [SKIP],
   'language/statements/for-of/continue-from-catch': [SKIP],
   'language/statements/for-of/continue-from-finally': [SKIP],
@@ -613,7 +608,6 @@
   'language/statements/for-of/continue-label-from-try': [SKIP],
   'language/statements/for-of/generator': [SKIP],
   'language/statements/for-of/generator-next-error': [SKIP],
-  'language/statements/for-of/let-bound-names-fordecl-tdz-for-of': [SKIP],
   'language/statements/for-of/nested': [SKIP],
   'language/statements/for-of/return': [SKIP],
   'language/statements/for-of/return-from-catch': [SKIP],
@@ -660,18 +654,6 @@
   'language/statements/function/S13.2.2_A18_T1': [SKIP],
   'language/statements/function/S13.2.2_A17_T2': [SKIP],
   'language/statements/function/S13.2.2_A17_T3': [SKIP],
-  'language/statements/let/block-local-closure-get-before-initialization': [SKIP],
-  'language/statements/let/block-local-closure-set-before-initialization': [SKIP],
-  'language/statements/let/block-local-use-before-initialization-in-declaration-statement': [SKIP],
-  'language/statements/let/block-local-use-before-initialization-in-prior-statement': [SKIP],
-  'language/statements/let/function-local-closure-get-before-initialization': [SKIP],
-  'language/statements/let/function-local-closure-set-before-initialization': [SKIP],
-  'language/statements/let/function-local-use-before-initialization-in-declaration-statement': [SKIP],
-  'language/statements/let/function-local-use-before-initialization-in-prior-statement': [SKIP],
-  'language/statements/let/global-closure-get-before-initialization': [SKIP],
-  'language/statements/let/global-closure-set-before-initialization': [SKIP],
-  'language/statements/let/global-use-before-initialization-in-declaration-statement': [SKIP],
-  'language/statements/let/global-use-before-initialization-in-prior-statement': [SKIP],
   'language/statements/try/S12.14_A14': [SKIP],
   'language/statements/while/S12.6.2_A4_T5': [SKIP],