src: update postmortem constants

Update two postmortem constants in the ustack helper that
changed while moving to V8 7.0.

PR-URL: #22754
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

src/v8abbr.h

@@ -89,12 +89,12 @@
  V8_OFF_HEAP(V8DBG_CLASS_SHAREDFUNCTIONINFO__NAME_OR_SCOPE_INFO__OBJECT)
 #define V8_OFF_SHARED_IDENT \
  V8_OFF_HEAP( \
- V8DBG_CLASS_SHAREDFUNCTIONINFO__FUNCTION_IDENTIFIER_OR_DEBUG_INFO__OBJECT)
+ V8DBG_CLASS_SHAREDFUNCTIONINFO__NAME_OR_SCOPE_INFO__OBJECT)
 #define V8_OFF_SHARED_SCRIPT \
- V8_OFF_HEAP(V8DBG_CLASS_SHAREDFUNCTIONINFO__SCRIPT__OBJECT)
+ V8_OFF_HEAP(V8DBG_CLASS_SHAREDFUNCTIONINFO__SCRIPT_OR_DEBUG_INFO__OBJECT)
 #define V8_OFF_SHARED_FUNIDENT \
  V8_OFF_HEAP( \
- V8DBG_CLASS_SHAREDFUNCTIONINFO__FUNCTION_IDENTIFIER_OR_DEBUG_INFO__OBJECT)
+ V8DBG_CLASS_SHAREDFUNCTIONINFO__NAME_OR_SCOPE_INFO__OBJECT)
 #define V8_OFF_SCRIPT_NAME \
  V8_OFF_HEAP(V8DBG_CLASS_SCRIPT__NAME__OBJECT)
 #define V8_OFF_SCRIPT_LENDS \