test: update postmortem metadata test

This commit updates the following postmortem metadata constants:

- v8dbg_class_SharedFunctionInfo__code__Code
  - This is now combined with SharedFunctionInfo's function_data.
  - Renamed: v8dbg_class_SharedFunctionInfo__function_data__Object
  - V8 commit: v8/v8@51ded9d

- v8dbg_class_SharedFunctionInfo__raw_name__Object and
- v8dbg_class_SharedFunctionInfo__scope_info__ScopeInfo
  - These are now combined as name_or_scope_info.
  - Renamed: v8dbg_class_SharedFunctionInfo__name_or_scope_info__Object
  - V8 commit: v8/v8@74a663b

Fixes: nodejs#44

test/parallel/test-postmortem-metadata.js

@@ -93,13 +93,12 @@ function getExpectedSymbols() {
     'v8dbg_class_Script__source__Object',
     'v8dbg_class_SeqOneByteString__chars__char',
     'v8dbg_class_SeqTwoByteString__chars__char',
-    'v8dbg_class_SharedFunctionInfo__code__Code',
+    'v8dbg_class_SharedFunctionInfo__function_data__Object',
     'v8dbg_class_SharedFunctionInfo__compiler_hints__int',
     'v8dbg_class_SharedFunctionInfo__end_position__int',
     'v8dbg_class_SharedFunctionInfo__function_identifier__Object',
     'v8dbg_class_SharedFunctionInfo__internal_formal_parameter_count__int',
-    'v8dbg_class_SharedFunctionInfo__raw_name__Object',
-    'v8dbg_class_SharedFunctionInfo__scope_info__ScopeInfo',
+    'v8dbg_class_SharedFunctionInfo__name_or_scope_info__Object',
     'v8dbg_class_SharedFunctionInfo__script__Object',
     'v8dbg_class_SharedFunctionInfo__start_position_and_type__int',
     'v8dbg_class_SlicedString__offset__SMI',