Add 4K more memory for the HugeConsStringOutOfMemory test case

test/cctest/test-api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3766 matching lines @@
 }
 
 
 TEST(HugeConsStringOutOfMemory) {
   // It's not possible to read a snapshot into a heap with different dimensions.
   if (i::Snapshot::IsEnabled()) return;
   // Set heap limits.
   static const int K = 1024;
   v8::ResourceConstraints constraints;
   constraints.set_max_young_space_size(256 * K);
-  constraints.set_max_old_space_size(3 * K * K);
+  constraints.set_max_old_space_size(3 * K * K + 4 * K);
   v8::SetResourceConstraints(&constraints);
 
   // Execute a script that causes out of memory.
   v8::V8::IgnoreOutOfMemoryException();
 
   LocalContext context;
   v8::HandleScope scope(context->GetIsolate());
 
   // Build huge string. This should fail with out of memory exception.
   Local<Value> result = CompileRun(
@@ skipping 15803 matching lines @@
   i::Semaphore* sem_;
   volatile int sem_value_;
 };
 
 
 THREADED_TEST(SemaphoreInterruption) {
   ThreadInterruptTest().RunTest();
 }
 
 #endif  // WIN32