[Interpreter] Rebuild dispatch table when FLAG_trace_ignition_codegen is enabled.

Otherwise, no handler would be dumped when using a snapshot.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1821663002

Cr-Commit-Position: refs/heads/master@{#34990}

src/interpreter/interpreter.cc

@@ -153,8 +153,9 @@ bool Interpreter::MakeBytecode(CompilationInfo* info) {
 }
 
 bool Interpreter::IsDispatchTableInitialized() {
-  if (FLAG_trace_ignition) {
-    // Regenerate table to add bytecode tracing operations.
+  if (FLAG_trace_ignition || FLAG_trace_ignition_codegen) {
+    // Regenerate table to add bytecode tracing operations
+    // or to print the assembly code generated by TurboFan.
     return false;
   }
   return dispatch_table_[0] != nullptr;