src: set --rehash-snapshot explicitly

To prepare for https://chromium-review.googlesource.com/c/v8/v8/+/4839486

PR-URL: https://github.com/nodejs/node/pull/49556
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

src/node.cc

@@ -838,6 +838,10 @@ static ExitCode InitializeNodeWithArgsInternal(
   V8::SetFlagsFromString(NODE_V8_OPTIONS, sizeof(NODE_V8_OPTIONS) - 1);
 #endif
 
+  // Specify this explicitly to avoid being affected by V8 changes to the
+  // default value.
+  V8::SetFlagsFromString("--rehash-snapshot");
+
   HandleEnvOptions(per_process::cli_options->per_isolate->per_env);
 
   std::string node_options;