[build] Fix a clang warning

test/cctest/trace-extension.cc

 // Copyright 2014 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 68 matching lines @@
   CHECK_EQ(2, args.Length());  // Ignore second argument on 32-bit platform.
 #if defined(V8_HOST_ARCH_32_BIT)
   Address fp = *reinterpret_cast<Address*>(*args[0]);
 #elif defined(V8_HOST_ARCH_64_BIT)
   int64_t low_bits = *reinterpret_cast<uint64_t*>(*args[0]) >> 32;
   int64_t high_bits = *reinterpret_cast<uint64_t*>(*args[1]);
   Address fp = reinterpret_cast<Address>(high_bits | low_bits);
 #else
 #error Host architecture is neither 32-bit nor 64-bit.
 #endif
-  printf("Trace: %p\n", fp);
+  printf("Trace: %p\n", static_cast<void*>(fp));
   return fp;
 }
 
 
 static struct {
   TickSample* sample;
 } trace_env = { NULL };
 
 
 void TraceExtension::InitTraceEnv(TickSample* sample) {
@@ skipping 61 matching lines @@
   v8::HandleScope scope(args.GetIsolate());
   const Address js_entry_sp = GetJsEntrySp();
   CHECK(js_entry_sp);
   CompileRun("js_entry_sp();");
   CHECK_EQ(js_entry_sp, GetJsEntrySp());
 }
 
 
 }  // namespace internal
 }  // namespace v8