test: update test-postmortem-metadata.js

The following metadata has changed:

- v8dbg_class_UncompiledData__inferred_name__String
  - Implementation was moved to Torque and required
    update to gen-postmortem-metadata.py.
  - Refs: v8/v8@e4e86b5

- v8dbg_class_SharedFunctionInfo__script_or_debug_info__Object
  - Renamed to v8dbg_class_SharedFunctionInfo__script_or_debug_info__HeapObject
  - Refs: v8/v8@07fc96c

- v8dbg_type_JSRegExp__JS_REGEXP_TYPE
  - Renamed to v8dbg_type_JSRegExp__JS_REG_EXP_TYPE.
  - Refs: v8/v8@61815a2

test/v8-updates/test-postmortem-metadata.js

@@ -102,7 +102,7 @@ function getExpectedSymbols() {
     'v8dbg_class_UncompiledData__inferred_name__String',
     'v8dbg_class_SharedFunctionInfo__internal_formal_parameter_count__uint16_t',
     'v8dbg_class_SharedFunctionInfo__name_or_scope_info__Object',
-    'v8dbg_class_SharedFunctionInfo__script_or_debug_info__Object',
+    'v8dbg_class_SharedFunctionInfo__script_or_debug_info__HeapObject',
     'v8dbg_class_UncompiledData__start_position__int32_t',
     'v8dbg_class_SlicedString__offset_offset__int',
     'v8dbg_class_SlicedString__parent__String',
@@ -162,7 +162,7 @@ function getExpectedSymbols() {
     'v8dbg_type_JSGlobalObject__JS_GLOBAL_OBJECT_TYPE',
     'v8dbg_type_JSGlobalProxy__JS_GLOBAL_PROXY_TYPE',
     'v8dbg_type_JSObject__JS_OBJECT_TYPE',
-    'v8dbg_type_JSRegExp__JS_REGEXP_TYPE',
+    'v8dbg_type_JSRegExp__JS_REG_EXP_TYPE',
     'v8dbg_type_JSTypedArray__JS_TYPED_ARRAY_TYPE',
     'v8dbg_type_Map__MAP_TYPE',
     'v8dbg_type_Oddball__ODDBALL_TYPE',