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

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index 446059f34b1d4671c83cfd315f8e6eff2d623dea..3ad90ddade9fac590c3fc2e0e370f539b2401ac8 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -743,7 +743,6 @@
 }],  # 'arch == ppc and simulator_run == True'
 
 ['ignition == True', {
-  'const*': [SKIP],
   'debug-*': [SKIP],
   'es6/*': [SKIP],
   'es7/*': [SKIP],
@@ -795,10 +794,7 @@
   'compiler/property-refs': [SKIP],
   'compiler/regress-3786': [SKIP],
   'compiler/regress-446647': [SKIP],
-  'compiler/regress-447567': [SKIP],
   'compiler/regress-469089': [SKIP],
-  'compiler/regress-96989': [SKIP],
-  'compiler/regress-const': [SKIP],
   'compiler/regress-funarguments': [SKIP],
   'compiler/regress-stacktrace-methods': [SKIP],
   'compiler/regress-variable-liveness': [SKIP],
@@ -811,14 +807,14 @@
   'compiler/variables': [SKIP],
   'context-calls-maintained': [SKIP],
   'contextual-calls': [SKIP],
+  'const-declaration': [SKIP],
+  'const-redecl': [SKIP],
   'cyclic-array-to-string': [SKIP],
   'd8-worker-sharedarraybuffer': [SKIP],
-  'declare-locally': [SKIP],
   'delete-in-with': [SKIP],
   'deopt-minus-zero': [SKIP],
   'deserialize-optimize-inner': [SKIP],
   'double-equals': [SKIP],
-  'eval-enclosing-function-name': [SKIP],
   'eval': [SKIP],
   'eval-stack-trace': [SKIP],
   'eval-typeof-non-existing': [SKIP],
@@ -827,7 +823,6 @@
   'for-in-opt': [SKIP],
   'for-in-special-cases': [SKIP],
   'getter-in-prototype': [SKIP],
-  'global-const-var-conflicts': [SKIP],
   'global-hash': [SKIP],
   'global-load-from-eval-in-with': [SKIP],
   'global-load-from-nested-eval': [SKIP],
@@ -854,10 +849,8 @@
   'regress/regress-1170': [SKIP],
   'regress/regress-117409': [SKIP],
   'regress/regress-1177809': [SKIP],
-  'regress/regress-1178598': [SKIP],
   'regress/regress-119609': [SKIP],
   'regress/regress-1199637': [SKIP],
-  'regress/regress-1200351': [SKIP],
   'regress/regress-123919': [SKIP],
   'regress/regress-124594': [SKIP],
   'regress/regress-124': [SKIP],
@@ -881,7 +874,6 @@
   'regress/regress-1757': [SKIP],
   'regress/regress-1790': [SKIP],
   'regress/regress-1853': [SKIP],
-  'regress/regress-186': [SKIP],
   'regress/regress-1980': [SKIP],
   'regress/regress-2071': [SKIP],
   'regress/regress-2163': [SKIP],
@@ -914,7 +906,6 @@
   'regress/regress-370827': [SKIP],
   'regress/regress-377290': [SKIP],
   'regress/regress-3884': [SKIP],
-  'regress/regress-3926': [SKIP],
   'regress/regress-3960': [SKIP],
   'regress/regress-3969': [SKIP],
   'regress/regress-3985': [SKIP],
@@ -936,7 +927,6 @@
   'regress/regress-4320': [SKIP],
   'regress/regress-4325': [SKIP],
   'regress/regress-4374': [SKIP],
-  'regress/regress-4388': [SKIP],
   'regress/regress-446389': [SKIP],
   'regress/regress-447756': [SKIP],
   'regress/regress-4509-Class-constructor-typeerror-realm' : [SKIP],
@@ -965,7 +955,6 @@
   'regress/regress-806473': [SKIP],
   'regress/regress-842017': [SKIP],
   'regress/regress-84234': [SKIP],
-  'regress/regress-88591': [SKIP],
   'regress/regress-88858': [SKIP],
   'regress/regress-94425': [SKIP],
   'regress/regress-94873': [SKIP],