[interpreter] Add register output to ObjectLiteral

test/cctest/interpreter/bytecode_expectations/ForOf.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: mixed
 execute: yes
 wrap: yes
 
 ---
@@ skipping 438 matching lines @@
 ---
 snippet: "
   var x = { 'a': 1, 'b': 2 };
   for (x['a'] of [1,2,3]) { return x['a']; }
 "
 frame size: 15
 parameter count: 1
 bytecode array length: 309
 bytecodes: [
   /*   30 E> */ B(StackCheck),
-  /*   42 S> */ B(CreateObjectLiteral), U8(0), U8(0), U8(1),
-                B(Star), R(8),
-                B(Star), R(6),
+  /*   42 S> */ B(CreateObjectLiteral), U8(0), U8(0), U8(1), R(8),
+                B(Mov), R(8), R(6),
                 B(LdaZero),
                 B(Star), R(2),
                 B(Mov), R(context), R(10),
                 B(Mov), R(context), R(11),
   /*   77 S> */ B(CreateArrayLiteral), U8(1), U8(1), U8(3),
                 B(Star), R(13),
                 B(LdaConstant), U8(2),
   /*   77 E> */ B(LdrKeyedProperty), R(13), U8(3), R(12),
   /*   77 E> */ B(Call), R(12), R(13), U8(1), U8(1),
                 B(Star), R(0),
@@ skipping 121 matching lines @@
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
 ]
 handlers: [
   [15, 137, 143],
   [18, 96, 98],
   [217, 227, 229],
 ]