fixup! fix parallel/test-code-cache test

Author: bnoordhuis

tools/code_cache/mkcodecache.cc

@@ -55,6 +55,9 @@ int main(int argc, char* argv[]) {
     v8::Local<v8::Context> context = v8::Context::New(isolate);
     v8::Context::Scope context_scope(context);
 
+    // The command line flags are part of the code cache's checksum so reset
+    // --random_seed= to its default value before creating the code cache.
+    v8::V8::SetFlagsFromString("--random_seed=0");
     std::string cache = CodeCacheBuilder::Generate(context);
     out << cache;
     out.close();