[api] Fix compilation error with gcc

enum values need to be explicitly casted to int type to
prevent the following error:
```
expects argument of type 'int', but argument 3 has type
'v8::internal::{anonymous}::V8StartupState'
```

Bug: v8:12309
Change-Id: I9515cde7d2496ca070ce4c6b751501236864730b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3401398Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#78688}

src/init/v8.cc

@@ -70,14 +70,15 @@ void AdvanceStartupState(V8StartupState expected_next_state) {
     // isolate->Dispose();
     // v8::V8::Dispose();
     // v8::V8::DisposePlatform();
-    FATAL("Wrong intialization order: got %d expected %d!", current_state,
-          next_state);
+    FATAL("Wrong intialization order: got %d expected %d!",
+          static_cast<int>(current_state), static_cast<int>(next_state));
   }
   if (!v8_startup_state_.compare_exchange_strong(current_state, next_state)) {
     FATAL(
         "Multiple threads are initializating V8 in the wrong order: expected "
         "%d got %d!",
-        current_state, v8_startup_state_.load());
+        static_cast<int>(current_state),
+        static_cast<int>(v8_startup_state_.load()));
   }
 }